python 如何让 raw_input 重复直到我想退出？
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How to let a raw_input repeat until I want to quit?
提问by timy
Say I want to use raw_inputlike this:
说我想这样使用raw_input：
code = raw_input("Please enter your three-letter code or a blank line to quit: ")
code = raw_input("Please enter your three-letter code or a blank line to quit: ")
under:
在下面：
if __name__=="__main__":
How can I let it repeat multiple times rather than just once every time I run the program?
Another question is to write what code can satisfy the condition "or a blank line to quit (the program)".
我怎样才能让它重复多次而不是每次运行程序时只重复一次？
另一个问题是写什么代码可以满足条件“或空行退出（程序）”。
回答by Alex Martelli
best:
最好的：
if __name__ == '__main__':
while True:
entered = raw_input("Please enter your three-letter code or leave a blank line to quit: ")
if not entered: break
if len(entered) != 3:
print "%r is NOT three letters, it's %d" % (entered, len(entered))
continue
if not entered.isalpha():
print "%r are NOT all letters -- please enter exactly three letters, nothing else!"
continue
process(entered)
回答by ghostdog74
while 1:
choice=raw_input("Enter: ")
if choice in ["Q","q"]: break
print choice
#do something else
回答by Hyperboreus
def myInput():
return raw_input("Please enter your three-letter code or a blank line to quit: ")
for code in iter(myInput, ""):
if len(code) != 3 or not code.isalpha():
print 'invalid code'
continue
#do something with the code
回答by inspectorG4dget
if __name__ == '__main__':
input = raw_input("Please enter your three-letter code or leave a blank line to quit: ")
while input:
input = raw_input("Please enter your three-letter code or leave a blank line to quit: ")
