Python / 从字符串中删除特殊字符
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Python / Remove special character from string
提问by Or Smith
I'm writing server side in python.
我正在用python编写服务器端。
I noticed that the client sent me one of the parameter like this:
我注意到客户端向我发送了这样的参数之一：
"? tryit1.tar? "
I want to get rid of spaces (and for that I use the replacecommand), but I also want to get rid of the special character: "?".
我想去掉空格（为此我使用replace命令），但我也想去掉特殊字符：“？”。
How can I get rid of this character (and other weird characters, which are not -,_,*,.) using python command?
如何使用 python 命令摆脱这个字符（和其他奇怪的字符，不是-, _, *, .）？
采纳答案by Daniel Roseman
A regex would be good here:
正则表达式在这里会很好：
re.sub('[^a-zA-Z0-9-_*.]', '', my_string)
回答by Bartosz Marcinkowski
>>> import string
>>> my_string = "? tryit1.tar? "
>>> acceptable_characters = string.letters + string.digits + "-_*."
>>> filter(lambda c: c in acceptable_characters, my_string)
'tryit1.tar'
回答by enrico.bacis
I would use a regex like this:
我会使用这样的正则表达式：
import re
string = "? tryit1.tar? "
print re.sub(r'[^\w.]', '', string) # tryit1.tar
