【Python】Learn Python the hard way, ex25 函数综合练习

def break_words(stuff):
"""This function will break up words for us."""
words = stuff.split(" ")
return words

def sort_words(words):
"""Sorts the words."""
return sorted(words)

def print_first_word(words):
"""Prints the first word after popping it off."""
word = words.pop(0)
print word

def print_last_word(words):
"""Print the last word after popping it off."""
word = words.pop(-1)
print word

def sort_sentence(sentence):
"""Takes in a full sentence and returns the second words."""
words = break_words(sentence)
return sort_words(words)

def print_first_and_last(sentence):
"""Print the first and last words of the sentence."""
words = break_words(sentence)
print_first_word(words)
print_last_word(words)

def print_first_and_last_sorted(sentence):
"""Sorts the words then prints the first and last one."""
words = sort_sentence(sentence)
print_first_word(words)
print_last_word(words)