Question

我有一个while循环，它会一直要求用户输入单词，直到他们输入停止。输入存储在名为sentence的变量中。我的问题是如何将多个输入存储到一个变量中。

我目前的代码是

stop = "stop"   
sentence = []
while sentence != stop:
    sentence = input("Enter a word: ")
    sentence = sentence
    print(sentence)

我不明白如何从一个输入中存储变量并打印出以逗号/空格等分隔的所有变量

Answer 1

stop = "stop"
# okay --- 'sentence' is a list. Good start.   
sentence = []
while sentence != stop:
    # ...but now you've replaced the list 'sentence' with the word that was just input
    # NOTE that in Python versions < 3, you should use raw_input below.
    sentence = input("Enter a word: ")
    # ...and this does nothing.
    sentence = sentence
    print(sentence)

如果您执行以下操作，效果会更好：

stop = "stop"   
sentence = []
# create a new variable that just contains the most recent word.
word = ''
while word != stop:
    word = input("Enter a word: ")
    # stick the new word onto the end of the list
    sentence.append(word)
    print(sentence)
# ...and convert the list of words into a single string, each word
# separated by a space.
print " ".join(sentence)

...或者重新设计一下以省略＆＃39;停止＆＃39;，如：

stop = "stop"   
sentence = []
while True:
    word = input("Enter a word: ")
    if word == stop:
        # exit the loop
        break
    sentence.append(word)

# ...and convert the list of words into a single string, each word
# separated by a space.
print " ".join(sentence)

Answer 2

您需要做的就是将append()新变量添加到数组中：

>>> a = []
>>> for x in range(5):
...     a.append("Hello!")
... 
>>> a
['Hello!', 'Hello!', 'Hello!', 'Hello!', 'Hello!']

最后，如果您需要单个变量中的所有内容，则可以使用join()：

>>> ",".join(a)
'Hello!,Hello!,Hello!,Hello!,Hello!'

Answer 3

非常简单

stop = "stop"   
sentence = []
all = ""
while sentence != stop:
    sentence = input("Enter a word: ")
    all += sentence + ","
    print(all)

Answer 4

你可能想要这样的东西：

sentence = []

while True:
    word = input("Enter a word: ")
    if word == "stop":
        break
    sentence.append(word)

print " ".join(sentence) + "."

Answer 5

你的一个问题是你经常写你的句子变量。

您要做的是使用list append方法。列表上的文档：

https://docs.python.org/3/tutorial/datastructures.html

示例：

a = []
a.append(1)
a.append(2)
a.append(3)
print(a)
[1, 2, 3]

接下来，如果用户输入“停止”，您希望结束代码。所以你应该做的是检查你的循环是否写了“stop”，并使用Python的break来打破循环。

这意味着您应该将循环更改为无限循环，直到您使用stop获得while True。

您的代码现在看起来像这样：

sentence = []
while True:
    entry = input("Enter a word: ")
    if entry == "stop":
        break
    sentence.append(entry)
    print(sentence)

在一个变量中存储多个输入

5 个答案: