Different ways to reverse a list in #Python: in-place, creating an iterator, slicing with negative step:
>>> numbers = [1, 2, 3, 4, 5] >>> numbers.reverse() >>> numbers [5, 4, 3, 2, 1] >>> list(reversed(numbers)) [1, 2, 3, 4, 5] >>> numbers [5, 4, 3, 2, 1] >>> numbers[::-1] [1, 2, 3, 4, 5]
Bite 12. Write a user validation function
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Create a function that takes a username and checks for a valid user:
- The username is in
USERS,- the user is not expired, and
- the user has the
ADMINrole.If those 3 conditions are met return
SECRET.If one of the conditions is not
Trueraise an exception you define yourself:UserDoesNotExist,UserAccessExpiredandUserNoPermissionrespectively. Check out the tests for more detail.Have fun and keep calm and code in Python!
