Bites of Py Exercises

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Bite Tags User difficulty More info / forum

101. f-strings and a simple if/else

The latest way to print to the screen in Python (>= 3.6) is with f-strings.In this Bite we'll get you …

f-strings if/else ⚬⚬⚬⚬

102. Infinite loop, input, continue and break

In this Bite we'll get you to take user input using the input builtin and see if it matches items …

break continue input

mock.patch while
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103. Loop through a dictionary and pluralise a word

You're given a dictionary of people and the number of games they've won.Use a for loop to iterate over the …

dict looping ⚬⚬⚬

104. Split and join

Split up the message on newline (\n) using the split builtin, then use the join builtin to stitch it together …

join split ⚬⚬⚬

105. Slice and dice

Take the block of text provided and strip off the whitespace at both ends. Split the text by newline (\n).Loop …

replace slicing split

string module strip
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106. Strip out vowels and count the number of replacements

In this Bite we'd like you to loop over the characters in the large block of text (the most important …

counting regular expressions replace

string manipulation Zen of Python
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107. Filter numbers with a list comprehension

Complete the function below that receives a list of numbers and returns only the even numbers that are > 0 …

list comprehensions modulo ⚬⚬

108. Loop over a dict of namedtuples calculating a total score

In this Bite you calculate the total amount of points earned with Ninja Belts by accessing the given ninja_belts dict.You …

counting dict namedtuple

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109. Workout dict lookups and raising an exception

In this Bite you learn how to lookup values from a dictionary or in Python: dict.You are presented with workout_schedule …

dict exception handling format

string manipulation ternary
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110. Type conversion and exception handling

In this Bite you complete the divide_numbers function that takes a numerator and a denominator (the number above and below …

exception handling raise type casting

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Bite Tags User difficulty More info / forum

1. Sum n numbers

Write a function that can sum up numbers:It should receive a list of n numbers. If no argument is provided, …

default args None range

sum
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5. Parse a list of names

In this bite you will work with a list of names.First you will write a function to take out duplicates …

lambda list comprehensions min

sorting
⚬⚬⚬⚬⚬

8. Rotate string characters

Write a function that rotates characters in a string, in both directions:if n is positive move characters from beginning to …

deque slicing ⚬⚬⚬⚬

15. Enumerate 2 sequences

Iterate over the given names and countries lists, printing them prepending the number of the loop (starting at 1). Here …

enumerate string formatting ⚬⚬⚬⚬⚬

16. PyBites date generator

Write a generator that returns special dates for PyBites: Every year mark counting from PYBITES_BORN date (so 19th of Dec …

datetime generators ⚬⚬⚬⚬⚬⚬

19. Write a simple property

Write a simple Promo class. Its constructor receives a name str and expires datetime.Add a property called expired which returns …

datetime properties ⚬⚬⚬⚬⚬

21. Query a nested data structure

Given the provided cars dictionary:Get all JeepsGet the first car of every manufacturer.Get all vehicles containing the string Trail in …

data structures dictionary comprehensions list comprehensions

sorting
⚬⚬⚬⚬⚬

26. Dictionary comprehensions are awesome

A dictionary comprehension is like a list comprehension, but it constructs a dict instead of a list. They are convenient …

dictionary comprehensions ⚬⚬⚬

29. Martin's IQ test

Martin is preparing to pass an IQ test.The most frequent task in this test is to find out which one …

enumerate string module ⚬⚬⚬⚬

32. Don't let mutability fool you

In this Bite you are presented with a function that copies the given items data structure.There is a problem though, …

deepcopy mutability ⚬⚬

37. Rewrite a for loop using recursion

Although you have to be careful using recursion it is one of those concepts you want to at least understand. …

recursion reverse ⚬⚬⚬

38. Using ElementTree to parse XML

In this Bite you will use ElementTree to parse some Nolan movies we extracted from OMDb.Luckily most APIs switched to …

movie data xml ⚬⚬⚬⚬⚬

43. Force keyword arguments

Write a function called get_profile that can only allows 2 keyword arguments: name and profession which default to julian and …

function arguments kwargs ⚬⚬⚬⚬

44. License key generator

Write a function called gen_key that creates a license key with this format: KI80OMZ7-5OGYC1AC-735LDPT1-4L11XU1UThe key consists of a combination of …

list comprehensions secrets string module

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45. Keep a queue of last n items

How about writing a queue that holds the last 5 items? Queue follows First-In-First-Out methodology, i.e., the data item stored …

deque ⚬⚬⚬⚬

46. You are a programmer! Code Fizz Buzz

Here is a beginner Bite to write Fizz Buzz: Fizz buzz is a group word game for children to teach …

fizzbuzz ⚬

54. Nicer formatting of a poem or text

In this Bite you complete print_hanging_indents to print a poem (or text) in a nicer way. For example calling it …

string manipulation textwrap ⚬⚬⚬⚬⚬

55. Get the latest game releases from Steam's RSS feed

The Steam gaming platform has an RSS feed of their latest game releases. In this Bite, you'll pull down and …

feedparser namedtuple ⚬⚬

56. Add a command line interface to our BMI calculator

Complete create_parser below so that our BMI program can be called like this: $ python bmi.py -h usage: bmi.py [-h] …

argparse ⚬⚬⚬⚬

64. Fix a truncating zip function

Bert is in charge of organizing an event and got the attendees names, locations and confirmations in 3 lists. Assuming …

itertools zip ⚬⚬⚬

66. Calculate the running average of a sequence

Write a function that takes a sequence of items and returns the running average, so for example this: running_mean([1, 2, …

enumerate mean ⚬⚬⚬

67. Working with datetimes

This Bite involves solving two problems using datetime:We kicked off our 100 Days of Code project on March 30th, 2017. …

datetime timedelta ⚬⚬⚬

68. Remove punctuation characters from a string

Complete remove_punctuation which receives an input string and strips out all punctuation characters (!"#$%&\'()*+,-./:;<=>[email protected][\\]^_`{|}~).Return the resulting string. You can go …

string manipulation string module ⚬

74. What day of the week were you born on?

Complete weekday_of_birth_date which takes a date object of a birthday and returns the corresponding weekday string.For example Bob and Julian's …

calendar ⚬⚬

77. New places to travel to

You want to find people who have as much exposure to different cultures as yourself.Complete the uncommon_cities helper that takes …

set set operations ⚬⚬

80. Check equality of two lists

In this Bite we compare two list objects for equality, a fundamental thing to understand in Python.Complete the check_equality function …

enum equality list

⚬⚬⚬

83. At what time does PyBites live?

Get to know pytz! pytz brings the Olson tz database into Python (docs). Let's see how many hours Bob and …

pytz timezones ⚬⚬⚬

91. Matching multiple strings

Catching up after #PyCon2018 ... in this Bite you do multiple string matching. Complete contains_only_vowels, contains_any_py_chars, and contains_digits below. See …

all any re

string matching
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96. Build Unix' wc program in Python

In this Bite you will convert Unix' wc command into Python. Your function takes a file (absolute path), reads it …

file processing tempfile Unix

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100. Display the last part of a file (Unix tail)

Complete the function below simulating Unix' tail, for example: $ tail -3 test_tail.py # byte to str conversion and strip …

file processing slicing strip

Unix
⚬⚬

115. Count leading spaces

A small but interesting Bite: given a string with leading indent spacing, calculate the amount of space (literal space, not …

counting string matching ⚬

117. Round a number even (a.k.a. banker's rounding)

Bankers Rounding is an algorithm for rounding quantities to integers, in which numbers which are equidistant from the two nearest …

Decimal rounding ⚬⚬

128. Work with datetime's strptime and strftime

In this Bite you get some more practice with datetime's useful strptime and stftime.Complete the two functions: years_ago and convert_eu_to_us_date …

datetime strftime strptime

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130. Analyze some basic Car Data

In this exercise you will analyze some basic car data. Here is the (fake) JSON data we created with Mockeroo …

Counter data analysis list comprehensions

set
⚬⚬⚬⚬

133. Convert an Amazon URL into an affiliation link

Can you help PyBites automate their Amazon affiliation link creation?Complete the generate_affiliation_link(url) function below which should convert the following links: …

regular expressions string manipulation ⚬

136. Bloodtypes

Check red blood cell compatibility between donor and recipient. For simplicity, only eight basic types of blood are considered. The …

enum exception handling multi type input

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143. Look up a value in 3 dictionaries

In this Bite you are presented with 3 dictionaries. Complete get_person_age that takes a name as argument and returns the …

collections dict ⚬⚬

149. Sorting words with constraint

Here is a list of words Jacob is trying to sort: >>> words = "It's almost Holidays and PyBites wishes …

lambda sorting string manipulation

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153. Round a sequence of numbers

It's time to get mathematical! In this Bite we ask that you complete the round_up_or_down function that receives a transactions …

list comprehensions math rounding

⚬

161. Count the number of files and directories

Complete count_dirs_and_files traversing the passed in directory path.Return a tuple of (number_of_directories, number_of_files)Let's use the tree command to show an …

counting directories files

os module
⚬⚬

165. Parse an /etc/passwd file output

The /etc/passwd file is a text-based database of information about users that may log into the system or other operating …

split string manipulation tuple unpacking

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167. Complete a User class: properties and representation dunder methods

In this Bite you are presented with another class, User this time. Like last Bite you are asked to complete …

classes dunder methods f-strings

properties __repr__ __str__ string manipulation
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169. Simple length converter

Your task is to complete the convert() function. It's purpose is to convert centimeters to inches and vice versa. As …

exception handling numbers rounding

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172. Having fun with Python Partials

Meet another gem in the standard library: functools, which contains tools for functional-style programming.In this Bite you will play with …

functools partial rounding

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176. Create a variable length chessboard

In this Bite you are going to print a chessboard to stdout (use print).Complete create_chessboard that takes an optional argument …

modulo range stdout

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180. Group names by country

In this Bite you are presented with a list of surnames, names, and countries. These 3 fields are in a …

collections defaultdict groupby

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181. Keep a list sorted upon insert

Complete the add method of the OrderedList class which takes a num argument and adds that to the self._numbers list …

bisect classes data structures

__str__
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188. Get statistics from PyBites test code

Did you know Python has a statistics module?For this Bite we did a line count on our test code for …

data analysis file processing statistics

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189. Filter a list of names

Here is a Bite to practice the continue and break statements in Python.Complete filter_names that takes a list of names …

break continue generators

looping
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192. Some logging practice

This is a simple logging exercise. The logging module is very useful and is part of the standard library; unfortunately …

callable logging ⚬⚬⚬⚬

201. Call a Cisco Nexus 9k device

Cisco Nexus 9k devices is one of the first network equipment with comprehensive API programmatic access from Cisco. API capabilities …

networking requests ⚬⚬⚬⚬⚬⚬⚬⚬

208. Find the number pairs summing up N

In this Bite you complete find_number_pairs which receives a list of numbers and returns all the pairs that sum up …

itertools looping numbers

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209. Write a Sphinx docstring

Your team uses Sphinx and wants you to comply with its standards for docstrings. As per the Sphinx-RTD-Tutorial a typical …

data types docstring sphinx

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210. Add Type Annotations

Continuing from where we left off in Bite 209, use the docstring you wrote in last Bite to add type …

annotations typing

214. A countdown generator

Write a simple generator that counts from 100 to 1. It can just return the ints one by one, no …

generators ⚬⚬

215. Validate a license key

Complete the validate_license function writing a regular expression that matches a PyBites license key which: Starts with PB, following 4 …

bool regular expressions ⚬⚬⚬⚬

218. Create a sandwich decorator

After creating our Decorators and Context Managers learning path we realized we did not have a beginner decorator Bite, so …

decorators ⚬⚬⚬⚬⚬

225. Swap case PyBites characters

In this Bite you will swap case all pybites characters (both lower- and upper case) for a given text.Not much …

looping string manipulation string parsing

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Bite Tags User difficulty More info / forum

3. Word Values

Calculate the dictionary word that would have the most value in Scrabble.There are 3 tasks to complete for this Bite:First …

max Scrabble sum

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30. Movie data analysis

In this Bite we are going to parse a csv movie dataset to identify the directors with the highest rated …

data analysis defaultdict mean

movie data namedtuple sorting
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4. Top 10 PyBites tags

Get the top 10 blog tags of PyBites (e.g. python, flask, django, learning). Our tests suppose you will use a …

Counter findall regular expressions

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6. PyBites Die Hard

Given a listing of files of our community branch determine who PR'd (= submitted pull request) the most (excluding PyBites) …

Counter file processing generators

namedtuple
⚬⚬⚬⚬⚬

7. Parsing dates from logs

In this bite we will look at this small server log finding the first and last system shutdown events: INFO …

datetime file processing ⚬⚬⚬⚬⚬⚬

9. Palindromes

Write a function to determine if a word (or phrase) is a palindrome.Then write a second function to receive a …

list comprehensions max reverse

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10. Practice exceptions

In this bite you learn to catch/raise exceptions.Write a simple division function meeting the following requirements:when denominator is 0 catch …

exception handling raise ⚬⚬⚬⚬

12. Write a user validation function

Create a function that takes a username and checks for a valid user:The username is in USERS,the user is not …

classes exception handling namedtuple

⚬⚬⚬⚬

13. Convert dict to namedtuple/json

Write a function to convert the given blog dict to a namedtuple.Write a second function to convert the resulting namedtuple …

dict json namedtuple

⚬⚬⚬

14. Generate a table of n sequences

Write a function that receives one or more sequences. The sequences are already defined for you.The function should return a …

generators zip ⚬⚬⚬⚬⚬

17. Form teams from a group of friends

Write a function called friends_teams that takes a list of friends, a team_size (type int, default=2) and order_does_matter (type bool, …

itertools ⚬⚬⚬⚬

18. Find the most common word

Write a function that returns the most common (non stop)word in this Harry Potter text.Make sure you strip out non-alphanumeric …

Counter data analysis list comprehensions

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22. Write a decorator with argument

Write a decorator called make_html that wraps text inside one or more html tags. As shown in the tests decorating …

decorators ⚬⚬⚬⚬⚬⚬

25. No promo twice, keep state in a class

In this bite a real world scenario: PyBites has a growing set of Bites and gives away promos. They choose …

classes exception handling properties

⚬⚬⚬⚬⚬

27. Parse omdb movie json data

Working with APIs is very common these days and lucky for us they increasingly return JSON (over XML). We saved …

APIs glob json

movie data
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28. Converting date strings to datetimes

In this Bite you are provided with a list of publish dates of all our PyBites blog posts. They are …

Counter datetime findall

⚬⚬⚬⚬

33. Transpose a data structure

Sometimes you need to restructure a nested data structure. For example you can convert a dict in a list of …

dict zip ⚬⚬⚬⚬⚬

35. Having fun with heapq

In this Bite you are provided with 3 data structures: a list of ints, a list of datetimes, and a …

datetime heapq ⚬⚬⚬

36. Having fun with *args and **kwargs

Write a function called get_profile that takes:a required name,a required age,one or more optional sports (args),one or more optional awards …

args function arguments kwargs

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39. Calculate the total duration of a course

In this Bite you read in a text file with course times (MM:SS) per video.You extract these and calculate the …

datetime findall numbers

timedelta
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41. Write a login_required decorator

If you worked with Flask or Django you must have seen routes being decorated to enforce authentication.In this Bite you …

decorators ⚬⚬⚬⚬

47. Write a new password field validator

You know these Create a new password forms? They do a lot of checks to make sure you make a …

re string module ⚬⚬⚬

48. Make a bar chart of new Safari books

Some time ago we made a little Slack bot to post new titles added to Safari to Slack. And luckily …

bar chart data analysis ⚬⚬⚬⚬

49. Scrape Packt's html with BeautifulSoup

In this Bite you will parse Packt's free learning ebook site extracting the html for the daily free ebook: As …

beautifulsoup namedtuple requests

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51. When does Python 2 die on Planet Miller?

Imagine you landed on Planet Miller (from the movie Interstellar) where 1 hour takes 7 Earth years (known as the …

datetime ⚬⚬⚬⚬

57. Create a simple calculator that receives command line arguments

In this Bite you write a simple calculator that can perform additions (add), subtractions (sub), multiplications (mul) and divisions (div).You …

argparse functools reduce

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59. Create a multiplication table class of variable length

Danny does not like rote learning (nor do we!). He is asked to remember multiplication tables of considerable size 😭Can …

classes dunder methods exception handling

numbers
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60. Create a deck of Uno cards

In this Bite you will create a deck of Uno cards. Here is the equipment requirement as described here - …

list list comprehensions namedtuple

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62. Data structures matter - speed up your Python code

In this Bite we provide you with 5 functions which you have to try to make faster. Some require different …

data structures performance ⚬⚬⚬

65. Get all valid dictionary words for a draw of letters

This Bite focusses on the use of itertools. To that extend you complete get_possible_dict_words and _get_permutations_draw to get all valid …

itertools Scrabble ⚬⚬⚬⚬⚬⚬

70. Create your own iterator

In this Bite you make an iterator called EggCreator by implementing the __iter__ and __next__ dunder methods (as dictated by …

iterators random ⚬⚬⚬

71. Keep state in a class + make its instance callable

In this Bite you write a small class to keep track of the max score in a game. When called …

classes dunder methods ⚬⚬⚬⚬

72. Retrieve the right Ninja Belt based on score

As you have probably seen on the new dashboard you can now gain Ninja Belts based on the amount of …

itertools OrderedDict ⚬⚬⚬⚬

73. Organize a meeting between timezones (pytz)

Help PyBites community friends find a reasonable common time to meet!Complete the function below receiving a UTC datetime and one …

pytz timezones ⚬⚬⚬⚬⚬

78. Find programmers with common languages

Similar as last Bite we do another comparison of sequences exercise.Here is the deal: you are in charge of huge …

set set operations ⚬⚬⚬

79. Parse a csv file and create a bar chart

We played a bit with the Slack API today and wow: our PyBites community is super international! We really enjoy …

bar chart community csv

requests
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81. Filter and order tweets by polarity values

In this Bite we collected some random tweets and populated a list of namedtuples of text and a polarity rating …

namedtuple TextBlob Twitter

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82. Define a Score Enum and customize it adding methods

Starting Python 3.4 there is support for enumerations (not to confuse with the enumerate builtin). You can define a class …

classmethod enum __str__

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84. Flatten lists recursively (Droste Bite)

Complete flatten that takes a list of lists (which can have lists ad infinitum) and flatten them into a one …

list recursion ⚬⚬⚬⚬

86. Create a RGB-to-Hex converter

Designer Mary wants to convert her CSS from statements like background-color: rgb(128, 128, 0); to: background-color: #808000;.Don't worry, you don't …

string formatting ⚬⚬⚬

87. Convert Decimal to Roman Numerals

Complete romanize that takes a decimal number and converts it to its Roman Numeral equivalent.If a non int or invalid …

numbers OrderedDict ⚬⚬⚬⚬

89. Playing with lists and dicts

In this Bite you are presented with a us_state_abbrev dict and a states list.Complete the four methods in the template …

data structures dict list

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90. What South Park characters talk most?

Did we already tell you we love the collections module? In this Bite we combine its defaultdict and Counter data …

Counter csv data analysis

defaultdict requests
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92. Humanize a datetime

In this Bite you will convert a timedelta object into something readable. We know: there are modules to do it, …

datetime namedtuple ⚬⚬⚬⚬⚬⚬

95. Subclass the dict built-in

In this Bite you will subclass the dict built-in to support a birthday dictionary.This dictionary takes names as keys and …

classes inheritance ⚬⚬⚬⚬⚬

97. BeautifulSoup II - scrape US holidays

In this Bite we use BeautifulSoup to scrape US holidays from OfficeHolidays to make a lookup of holidays per month.Check …

beautifulsoup defaultdict dict

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99. Write an infinite sequence generator

Write a generator that produces the sequence [1, 'A', 2, 'B', 3, 'C', ... 'X', 25, 'Y', 26, 'Z'] infinitely. …

generators itertools string module

zip
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111. Use the ipinfo API to lookup IP country

In this Bite you will use the requests library to make a GET request to the ipinfo service.Use IPINFO_URL and …

APIs json mock.patch

requests
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113. Filter words with non-ascii characters

In this Bite you extract words from a text that contain non-ascii characters. So Fichier non trouvΓ© would return a …

all ascii ord

unicode
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114. Implement a Color class with classmethods

As the new junior developer, you have been charged with enhancing the Color class. Your task will be to implement …

classmethod hex __repr__

__str__ string module
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116. List and filter files in a directory

In this Bite you complete get_files that receives a dirname and size_in_kb (note kb, not bytes).There are two things you …

generators glob os module

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118. List exercise: return first occurrence indices of duplicated words

In this Bite you are presented with a list of words. Loop through them and find all the words that …

counting list comprehensions set

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119. Xmas tree generator

In this Bite you complete generate_xmas_tree that takes a rows arg (= height of the tree). For each row you …

default args join range

string formatting
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120. Write a numbers validation decorator

Let's get some more practice with decorators ... in this Bite you will write a decorator that checks if input …

decorators ⚬⚬⚬

122. Check if two words are anagrams

An anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using …

anagram string matching ⚬⚬⚬⚬

123. Find the user with most friends

In this Bite you are presented with a users dict of keys=id's and values=usernames and a friendships list of user …

defaultdict looping sorting

tuples
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125. Get the most recommended books

The Tim Ferriss Show is full of wisdom and inspiration. It can also fill up your book shelves because a …

beautifulsoup Counter default args

list comprehensions requests
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127. Return the right ordinal suffix for a number

In this Bite you complete a function that takes an int and returns it appended with the right suffix: 1 …

dict modulo numbers

string manipulation
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129. Analyze Stock Data

In this Bite we will answer some questions about stocks, using some JSON data obtained from the awesome Mockeroo fake …

counting data analysis json

requests sorting string manipulation
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132. Find the word with the most vowels

Finish the get_word_max_vowels function below that takes a text string as its input argument and returns a tuple of the …

counting lambda list comprehensions

string matching
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135. Sort a list of book objects

In this Bite you are going to look at a list of Book namedtuples and sort them by various criteria. …

attrgetter datetime lambda

list namedtuple operator sorting
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137. Gourmets' Nightmare

Many gourmets struggle to find the perfect pairing of wines and cheeses. A number of considerations are relevant, each of …

Counter intersection operator

sorting
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138. OOP fun at the Zoo

Finish the Animal class below adding one or more class variables and a classmethod so that the following code: dog …

classes classmethod itertools

__str__
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140. PyBites First Pandas Bite

This is a Pandas proof-of-concept Bite. We just added the library to our platform! For this Bite you find out …

csv data analysis pandas

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141. Primitive date format inferrer

Complete the get_dates method given the following:a listing of date strings in unknown date format andan enum class which contains …

classmethod datetime enum

exception handling
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142. Exception Handling: Calculate the Winning Player

Complete the two functions below: calculate_score takes a list of dice roll scores and returns the total score only taking …

exception handling namedtuple numbers

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144. Calculate the Number of Months Passed

Some more fun working with dates! In this Bite you will calculate the number of months between the fixed START_DATE …

datetime dateutil exception handling

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146. Rhombus generator

In this Bite you make a generator of rhombus shapes. You will complete gen_rhombus that when called like this: gen …

format f-strings string formatting

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147. 100 WEEKDays of Code Date Range

Doing a #100DaysOfCode can be challenging, and some of it is because you dedicate to do it on workdays AND …

datetime dateutil ⚬⚬⚬⚬

148. Print Car Data Grouped by Manufacturer

In this Bite you are presented with a list of car (manufacturer, model) tuples. Group the data by manufacturer printing …

data structures itertools operator

sorting
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150. Turn messy CSV into JSON

At the 1 year mark of our platform here is Bite 150! In this Bite you are presented with some …

csv json re

string manipulation
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151. Contemporary Composers

You are given a list of operas and a list of composers. For two given composers find operas (where one …

datetime dict exception handling

generators namedtuple
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154. Write your own Data Class

As you might have noticed we are now on Python 3.7 so time for a Bite on data classes which …

data classes data structures hashable

sorting type hinting
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155. Split a string by spaces or quoted text

Another text manipulation Bite. Code split_words_and_quoted_text that takes a text string and splits it by space, except words that are …

split string manipulation ⚬⚬⚬

156. Make an index of story characters

You know the index at the end of a book where you look up which pages people and terms occur? …

collections defaultdict enumerate

sorting string matching
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157. Filter out accented characters

Another unicode Bite. Given some non-English text with accents (Γ‘, Γ©, Γ­, used in Spanish for example), extract the accented …

string matching unicode ⚬⚬⚬⚬

159. Create a simple calculator

In this Bite you will create a simple calculator. It takes a string of num1 operator num2 which you convert …

exception handling numbers operator

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162. Vertically align output of counters

In this Bite you are tasked with "physically" aligning the number of comments on a webpage.For some reason you are …

string formatting ⚬⚬

163. Which packages were upgraded?

In this Bite you compare a list of packages (aka requirement.txt) from before vs. after (pip) upgrade. Check the TESTS …

comparison dict numbers

string manipulation
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166. Complete a tox ini file parser class

The INI file format is an informal standard for configuration files for some platforms or software. (Wikipedia).In this Bite you …

classes configparser properties

string matching string parsing tox
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173. Set up future notifications

Let's do another datetime processing Bite. Complete add_todo below that converts time units to future timestamps.Here is how it works …

datetime findall f-strings

timedelta
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175. Find missing dates

Complete get_misssing_dates that takes an (unordered) sequence of datetime.date objects. It should determine what the start and end date of …

datetime dateutil pandas

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178. Parse PyBites blog git commit log

In this Bite we want to figure out how active we've been on our blog.To start our data analysis we …

Counter data analysis datetime

dateutil string parsing
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182. Parse a bunch of quotes from HTML

Let's get some inspiration. Below you find the simplified HTML of Richard Branson's My top 10 quotes on living life …

dict regular expressions string manipulation

string parsing
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184. Analyze some Bite stats data

In this Bite we will look at some Bite stats logs (usernames have been anonymized!): $ head -5 bite_output_log.txt bite,user,completed …

Counter csv data analysis

set
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185. Create a simple spelling suggester

In this Bite you will write a simple spelling corrector. Complete suggest_word that receives a misspelled word argument and returns …

difflib SequenceMatcher string matching

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186. Calculate number of books to have read at date ...

For this Bite you are asked to start working on a reading goal feature for PyBites My Reading List.Code up …

datetime dateutil exception handling

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187. Actor/actress age at movie release

Ever wondered how old an actor/actress was in a particular movie? In this Bite you will write some code to …

data classes dateutil f-strings

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190. Parse income distribution from Latin America XML

In this Bite you are going to parse some Latin American countries in xml, specifically the output of api.worldbank.org/V2/country?region=LCN which …

data analysis defaultdict xml

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191. Starwars character with highest BMI

In this Bite you will parse a multiline string of SWAPI Starwars characters.Calculate the BMI of each character returning a …

max operator string manipulation

tuple unpacking
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193. Most upvoted StackOverflow Python questions

In this Bite you parse a copy of StackOverflow Python questions which we cached here Retrieve + parse this URL …

beautifulsoup requests sorting

string matching web scraping
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194. Add caching to a Fibonacci function

In this Bite you will learn about memoization: In computing, memoization or memoisation is an optimization technique used primarily to …

fibonacci functools lru_cache

performance

195. Analyze NBA Data with sqlite3

In this Bite you are going to use sqlite3! We loaded some NBA data into a players DB table: Complete …

data analysis SQL sqlite3

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197. What date is Mother's Day celebrated?

It's the 12th of May 2019 when we write this so happy Mother's Day! In many countries this special day …

datetime dateutil ⚬⚬⚬

199. Multiple inheritance (__mro__)

Implement the following class structure: print(Child.__mro__): (<class '__main__.Child'>, <class '__main__.Father'>, <class '__main__.Mother'>, <class '__main__.Person'>, <class 'object'>) Each class has the …

classes inheritance __mro__

multiple inheritance
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202. Analyze some Bite stats data - part II

In this Bite you will analyze complexity levels of our first 200 Bites of Py exercises. We loaded this CSV …

csv data analysis sorting

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203. Type hinting practice

It's time for some type hinting! For this bite, you have been provided a very simple Employee class object. I …

classes data classes type hinting

205. Female speakers @ Pycon US

After our Code Challenge 62 / Alicante PyDay last week, we thought it would be nice to branch off a …

beautifulsoup counting data wrangling

gender_guesser
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206. Calculate and evenly split the bill

Three old friends Bob, Mary, and Alice meet at PyCon and decide to go out to dinner together. They have …

Decimal numbers rounding

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212. Suppressing exceptions

Ever wanted to suppress an exception? Check out Python's contextlib module. In this Bite you refactor sum_numbers which has some …

context managers exception handling ⚬⚬⚬

217. Capture stdout

Sometimes you need to capture stdout in your script. Python makes it easy with contextlib's redirect_stdout. In this Bite you …

context managers StringIO ⚬⚬⚬⚬

219. Bite notification planner

Another real world use case. When we added notifications to our learning paths, we gave the user the option to …

datetime generators ⚬⚬⚬⚬

221. Parse best selling lists using the NY Times API

In this Bite you are going to parse NY Times Best Seller Lists using The New York Times Developer Network.This …

APIs json requests

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222. Split an iterable in groups of size n

In this Bite you will complete the group function that receives an iterable and splits it up in n groups. …

generators iterators itertools

looping
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223. Unix file permissions

Each file and directory in Unix has its permissions broken down into owner, group and other (world) attributes, see here.Each …

dict list comprehensions string manipulation

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226. Get top titles from news.python.sc

There is a new Python news aggregator in town! Check it out here. In this Bite you will parse it!Imagine …

beautifulsoup namedtuple news

requests sorting string parsing web scraping
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227. Convert Warcraft json data to csv

In this Bite we are going to convert some Warcraft Mount JSON data to csv.Here are the steps to take:Complete …

csv exception handling json

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228. Create a Gravatar URL

In this Bite you will generate a Gravatar URL, e.g. https://www.gravatar.com/avatar/5b13356d467af88631503c27a3d0e0cf?s=200&r;=g&d;=robohash.In this URL 5b13356d467af88631503c27a3d0e0cf is a hash of a lowercase …

gravatar hashlib string formatting

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Bite Tags User difficulty More info / forum

2. Regex Fun

Learn Python regular expressions by writing the following 3 functions. In each function's docstring we show the expected result. The …

findall re regular expressions

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11. Enrich a class with dunder methods

Let's enrich an Account class by adding dunder (aka special) methods to support the following:length of the object: len(acc) returns …

dunder methods properties ⚬⚬⚬⚬

20. Write a context manager

Write a context manager to roll back a transaction on the given Account class.There are two special (aka dunder) methods …

context managers dunder methods with statement

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23. Find words that are > 95% similar

Given a list of tags of our blog find the ones that have a similarity score of over 95%Don't worry, …

difflib file processing findall

itertools SequenceMatcher
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24. ABC's and class inheritance

ABC's or Abstract Base Classes are great to enforce a common API for your subclasses.You define one or more methods …

ABCs abstractmethod classes

inheritance
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31. Matrix multiplication / @ operator

Since 3.5 Python has a binary operator to be used for matrix multiplication: @, see PEP 465 -- A dedicated …

dunder methods __matmul__ ⚬⚬⚬⚬⚬⚬⚬⚬⚬

34. Building a Karma app - implement the User class

This Bite is about implementing a User class that keeps track of karma points received (Bite idea came from our …

classes dunder methods namedtuple

properties
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40. Write a binary search algorithm

There are many ways to search for an item in an ordered collection. One of the slowest methods is to …

algorithms binary search ⚬⚬⚬⚬⚬⚬

42. Number Guessing Game Class

In this Bite you implement a Game class to perform a number guessing game. It lets a user do a …

classes games random

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50. Make a little PyBites search engine (feedparser)

Complete the program below to create a little search command line app to search the PyBites blog on tags. It …

any feedparser list comprehensions

namedtuple search
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52. Create a movie quote API with Flask

In this Advanced Bite you will implement a full-blown CRUD app to manage movie quotes using Flask. Implement the following …

APIs Flask movie data

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53. Convert text into multiple columns

You run a news site and you got feedback that people read more if articles are printed in 2 or …

string manipulation ⚬⚬⚬⚬⚬⚬

58. Using argparse to interface with a grocery cart

Below is a Groceries class with add/delete/show/search methods.You as a Python Developer are asked to give your users a command …

argparse ⚬⚬⚬⚬⚬

61. Create a variable size Paw Patrol card deck with random actions

The Paw Patrol card deck consists of 32 cards ranging A1-A2..B1-B2..C..G..H3-H4. 8 of these cards have an action associated: 2x …

itertools namedtuple random

string module
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63. Use an infinite iterator to simulate a traffic light

Complete traffic_light using itertools.cycle to return an infinite iterator to similate a traffic light.When called it should return a State …

iterators itertools namedtuple

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69. Regex Fun - part II

It's time for another Regex one! (here is part I)In this Bite you will complete 8 functions to hone your …

re regular expressions ⚬⚬⚬⚬⚬⚬

75. Parse Unix cal to a weekday mapping

In the last bite we return the weekday from a date object. And you probably used the calendar module.Unix has …

re Unix zip

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76. The singledispatch countdown challenge

We are stoked and grateful to have Martin have you practice functools.singledispatch (new in Python 3.4).PEP 443 defines generic programming …

decorators functools singledispatch

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85. Write an advanced property

After Bite 19. Write a simple property let's write a more advanced one.In this Bite you are presented with a …

classes properties ⚬⚬⚬⚬⚬

88. Write a performance monitoring context manager

It's time for Context Managers part II. In Bite 20 you used it to roll back a transaction implementing the …

context managers Counter ⚬⚬⚬⚬⚬⚬⚬

93. Rock-paper-scissors and generator's send

Generators are cool right?! Did you know you can send values into a generator by calling its send(value) method? Crazy …

coroutines games random

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94. Parse PyCon talk data from YouTube

PyCon2018 was awesome! But you clearly had to choose the whole time, so much was going on!In this Bite we …

list comprehensions max namedtuple

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98. Code your way out of a grid

Given a 2D grid of equal length x and y, can you print the route to go from 1 to …

looping namedtuple numbers

tuple unpacking
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112. Social Media Username Validator

In this Bite you parse social_platforms below into a dict of Validator namedtuples. For each social network you should extract …

namedtuple range re

regular expressions string manipulation string matching typing
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121. Determine the strength of a password

In this Bite you evaluate the strength of a password. Complete the function below and return a score from 0 …

re string matching ⚬⚬⚬⚬⚬⚬

124. Marvel data analysis

This is a simplified version of our Marvel Data Analysis we held at the Alicante PyChallengeDay.Complete most_popular_characters, max_and_min_years_new_characters and percentage_female …

Counter csv data analysis

list comprehensions rounding sum
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126. The Emoji (Unicode) Bite

Python 3 supports Unicode so we can do cool stuff like ... emojis πŸ˜…Let's play a bit with emoji-to-text and …

emojis sys unicode

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131. Screen scraper

This is the output from using screenFetch on my junky computer. [email protected] MMMMMMMMMMMMMMMMMMMMMMMMMmds+. OS: Mint 19 tara MMm----::-://////////////oymNMd+' Kernel: x86_64 …

dict index regular expressions

slicing string manipulation
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134. Two Sums

Given a random list of numbers, your task is to find the two indices that added together equal the target …

index looping sorting

sum
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139. Calculate a coding streak in days

In this Bite you are going to calculate the amount of days you are on a coding streak (consecutive days …

datetime string manipulation timedelta

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145. Record Breakers

The data for this challenge comes from a subset of The National Centers for Environmental Information (NCEI) Daily Global Historical …

csv data analysis pandas

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152. Manipulate string decorator

Write a decorator called strip_range that replaces characters with dots. It takes a start and an end int argument that …

decorators kwargs list

string manipulation
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158. Subclass the list built-in

In this Bite you will complete IntList, a subclass of list, which should be able to do the following: >>> …

dunder methods exception handling inheritance

list mean median properties statistics
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160. 15-way Rock Paper Scissors

In this Bite you are going to write a 15-way Rock Paper Scissors game (this challenge first appeared as part …

csv dict exception handling

games
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164. CLI tool: HTML link converter (stdin to stdout)

In this Bite you are going to help your team out automating a boring task. They reached out to you …

data wrangling exception handling html

stdin string formatting string manipulation sys
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168. Ninja Rankings

PyBites is starting a campaign to try and pair up the highest ranking Ninjas with some of the lower ranking …

bisect classes data classes

dunder methods heapq tuples

174. String manipulation and metrics

This bite will get you to play around with creating a dataclass and some text manipulation, formatting, and metrics gathering. …

Counter data classes list comprehensions

properties string formatting string manipulation translate
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170. Analyze McDonald's food data

In this Bite you are going to analyze some nutrition facts for McDonald's food, specially calories and proteinic rich options.The …

data analysis pandas ⚬⚬⚬

171. Make a terminal spinner animation

In this Bite you will spice up your command line apps with a loader animation.You will use itertools.cycle and sys.stdout …

command line itertools stdout

sys time
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177. Use Pandas to find most common genres in a movie excel sheet

Another pandas Bite: we took some fake movie data from Mockaroo, an awesome fake data service, and dumped it in …

data cleaning excel groupby

movie data pandas
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179. Strip comments from Python code

In this Bite you will strip off all comments from some Python source code. Complete strip_comments that takes some multiline …

comments regular expressions string parsing

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183. Analyze sales data with pandas

For this Bite we got some fake Excel sales data which we are going to analyze with pandas.First complete load_excel_into_dataframe …

data analysis groupby pandas

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196. Create a JS-like dict object

In this Bite we challenge you to make a dict-like object that supports attribute lookups, just like JS objects! Check …

classes dict inheritance

javascript
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198. Calculate my Mac's longest uptime

Given the following output, calculate the longest uptime / time between reboots: [[email protected] log]$ last reboot reboot ~ Wed Apr …

data wrangling datetime dateutil

string parsing
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200. πŸ₯³ Minecraft Enchantable Items

My kids love Minecraft and they always want me to play with them. At times gathering resources can get boring …

beautifulsoup web scraping ⚬⚬⚬⚬⚬⚬⚬⚬⚬

204. Pomodoro with asyncio

I got an asyncio and type hinting Bite for you. For this bite, you will be taking a simple Pomodoro …

asyncio pomodoro ⚬⚬⚬⚬⚬⚬

207. Cached property decorator

Given the sample class Planet, computing the mass attribute of an instance is a computationally expensive and time consuming operation. …

caching classes decorators

properties
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211. Write a retry decorator

Write a retry decorator that retries to execute the function it decorates. If the function raises an exception (any kind) …

decorators exception handling ⚬⚬⚬⚬⚬

213. Code a translation fixer

Imagine you built PyBites' new translation feature. You managed to successfully get translated text for a Bite, but there's a …

regular expressions ⚬⚬⚬⚬

216. Parse an email header

Write a regular expression to extract 4 pieces of information from an email header: From email To email Subject Date …

regular expressions ⚬⚬⚬⚬⚬⚬

220. Analysing @pythonbytes RSS feed

Another feedparser exercise! In this Bite we're going to analyze the Python Bytes Podcast feed a bit completing the PythonBytes …

classes Counter feedparser

max min namedtuple regular expressions string matching type hinting
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224. Get sentences from a text

Here is another fun regex exercise for you: it's easy to split text by newline using splitlines. Now try to …

data wrangling regular expressions string manipulation

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We use Python 3.7