Fixme.py

#!/usr/bin/python3


'''
Your solution for each function should be only a single line long.
In particular, you may not use any loops when implementing these functions;
instead, you must use either the map and filter functions
or list comprehensions.
'''


def evens(n):
    '''
    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)
    []
    '''
    return [x for x in range(0, n+1) if x % 2 == 0]


def threes(n):
    '''
    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]
    '''
    return [x for x in range(0, n+1) if '3' in str(x)]


def small_words(text):
    '''
    Returns a list of all words in the input text that
    are less than 4 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']
    '''
    return [word for word in text.split() if len(word) <= 4]


def squares(n):
    '''
    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]
    '''
    return [x*x for x in range(1, n+1)]


def lengths(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]
    '''
    return [len(x) for x in strings]