Fixme.py

#!/usr/bin/python3
'''
Complete each function below so that the test cases pass.
Your solutions should use the map and filter functions,
and not for loops or list comprehensions.
'''


def evens(n):
    return list(filter(lambda x: x % 2 == 0, map(lambda x: x, range(0, n+1))))
    '''
    Returns a list of even numbers from 0 to n inclusive.

    >>> evens(10)
    [0, 2, 4, 6, 8, 10]
    >>> evens(11)
    [0, 2, 4, 6, 8, 10]
    >>> evens(0)
    [0]
    >>> evens(1)
    [0]
    >>> evens(-1)
    []
    '''


def threes(n):
    return list(filter(lambda x: '3' in str(x), map(lambda x: x, range(n+1))))
    '''
    Returns a list of all numbers from 0
    to n inclusive that contain the digit 3.

    >>> threes(2)
    []
    >>> threes(3)
    [3]
    >>> threes(10)
    [3]
    >>> threes(20)
    [3, 13]
    >>> threes(50)
    [3, 13, 23, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 43]
    '''


def small_words(text):
    return list(filter(lambda x: len(x) < 5, text.split()))
    '''
    Returns a list of all words in the input
    text that are less than 5 characters long.

    HINT:
    Recall that text.split() converts the text variable into a list of words.

    >>> small_words('this is a simple test case')
    ['this', 'is', 'a', 'test', 'case']
    >>> small_words('really enormous words')
    []
    >>> small_words('')
    []
    >>> small_words('a big word is bad')
    ['a', 'big', 'word', 'is', 'bad']
    '''


def squares(n):
    return list(map(lambda x: x*x, filter(lambda x: x*x <= n, range(1, n+1))))
    '''
    Returns a list of all square number between 1 and n inclusive.
    Recall that the nth square number is defined to be n*n.

    >>> squares(1)
    [1]
    >>> squares(2)
    [1, 4]
    >>> squares(3)
    [1, 4, 9]
    >>> squares(10)
    [1, 4, 9, 16, 25, 36, 49, 64, 81, 100]
    '''


def lengths(strings):
    return list(map(len, strings))
    '''
    Given a list of strings, returns a list
    of the lengths of the corresponding strings.

    >>> lengths([])
    []
    >>> lengths(['test'])
    [4]
    >>> lengths(['this','is','a','test'])
    [4, 2, 1, 4]
    '''