原文習題
def break_words(stuff):
"""this function will break up words for us """
words = stuff.split(' ')
return words
def sort_words(words):
"""sorts the words."""
#排序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):
"""prints 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 sorted words."""
words = break_words(sentence)
return sort_words(words)
def print_first_and_last(sentence):
"""prints the first and last words of the sentense."""
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)
split()通過指定分隔符對字串進行切片，如果引數 num 有指定值，則僅分隔 num 個子字串
str.split(str="", num=string.count(str)).num – 分割次數。
例如：1.
str = "line1-abcdef \nline2-abc \nline4-abcd";
print (str.split(' ', 1 )
python ex0.py
['line1-abcdef', '\nline2-abc \nline4-abcd']
str = "line1-abcdef \nline2-abc \nline4-abcd";
print (str.split(' ', 2 )
python ex0.py
['line1-abcdef', '\nline2-abc', '\nline4-abcd']
pop()函式用於移除列表中的乙個元素（預設最後乙個元素），並且返回該元素的值。
sorted()函式對所有可迭代的物件進行排序操作。
>>>a = [5,7,6,3,4,1,2]
>>> b = sorted(a) # 保留原列表
>>> a
[5, 7, 6, 3, 4, 1, 2]
>>> b
[1, 2, 3, 4, 5, 6, 7]
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原始碼 命名函式 def break words stuff this function will break up words for us.設定變數words 使用.split 命令分割字串 words stuff.split 返回return words def sort words word...