Question

我想一遍又一遍地提示用户输入短语列表，直到他们输入END并将所有用户的输入保存到列表中。我怎么能这样做？

到目前为止我的代码：

print("Please input passwords one-by-one for validation.")
userPasswords = str(input("Input END after you've entered your last password.", \n))
boolean = True
while not (userPasswords == "END"):

Answer 1

您只需使用iter(input, 'END')即可返回callable_iterator。然后我们可以使用list()来获取真实的列表：

>>> l = list(iter(input, 'END'))
foo
bar
foobar
END
>>> l
['foo', 'bar', 'foobar']

如果你看一下help(iter)：

，关于它是如何运作的

iter(...)
    iter(iterable) -> iterator
    iter(callable, sentinel) -> iterator

    Get an iterator from an object.  In the first form, the argument must
    supply its own iterator, or be a sequence.
    In the second form, the callable is called until it returns the sentinel.

如果你认为它更简单明了，你也可以使用while循环：

l = []
while True:
    password = input()
    if password != 'END':
        l.append(password)
    else:
        break

演示：

>>> l = []
>>> while True:
...     password = input()
...     if password != 'END':
...         l.append(password)
...     else:
...         break
...         
...     
... 
foo
bar
END
>>> l
['foo', 'bar']

Answer 2

一种方法是使用while loop：

phraseList = []

phrase = input('Please enter a phrase: ')

while phrase != 'END':
    phraseList.append(phrase)
    phrase = input('Please enter a phrase: ')

print(phraseList)

结果：

>>> Please enter a phrase: first phrase
>>> Please enter a phrase: another one
>>> Please enter a phrase: one more
>>> Please enter a phrase: END
>>> ['first phrase', 'another one', 'one more']

在Python 3.5.1中将用户输入保存到列表中

2 个答案: