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Python Functional Python Functional Workhorses Map

Posted by Kir Ivanov
Kir Ivanov
Courses Plus Student 52 Points

Strange behaviour of console?

backwards = [ 'tac', 'esuoheerT', 'htenneK', [5, 4, 3, 2, 1], ]

def reverse(arg): return reversed(arg)

This code does not suits test, If you have ideas why, please let me know =)

maps.py 
backwards = [
    'tac',
    'esuoheerT',
    'htenneK',
    [5, 4, 3, 2, 1],
]

def reverse(arg):
  return reversed(arg)

2 Answers

Kourosh Raeen
Kourosh Raeen
23,733 Points
Kourosh Raeen
Kourosh Raeen
23,733 Points

There is no reversed() function in python. Try this:

backwards = [
    'tac',
    'esuoheerT',
    'htenneK',
    [5, 4, 3, 2, 1],
]

def reverse(arg):
  return arg[::-1]
Kourosh Raeen
Kourosh Raeen
23,733 Points
Kourosh Raeen
Kourosh Raeen
23,733 Points

My mistake. I searched for it but I guess I didn't do a good job of it.

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,457 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,457 Points

The issue is reversed() returns an iterator not a list. Wrapping the iterator with list() converts the iterator output into a list and passes Task 1:

def reverse(arg):
    return list(reversed(arg))