Get aprox number in a list

get_aprox.py

#!/usr/bin/env python
"""
Create a program that given a requested number gives you
the nearest number in a list.

Considerations:
    - The list needs to only contain integers

This example is useful when you have only a certain number of
images sizes available and you have to pick one for your station
collage.

e.g.:
    >>> requested_size = 21
    >>> sizes = (1, 2, 3, 19, 29, 10, 22, 3)
    >>> main(requested_size, sizes)
    22
"""

def main(requested_size, sizes):
    """
    >>> requested_size = 120
    >>> sizes = (33, 50, 52, 75, 100, 175, 180, 182, 200, 350)
    >>> main(requested_size, sizes)
    100
    """
    raise NotImplementedError('Write your code here')

if __name__ == '__main__':
    import doctest
    doctest.testmod()