[英]Replacing multiple characters at once
Is there any way to replace multiple characters in a string at once, so that instead of doing:有没有办法一次替换字符串中的多个字符,而不是这样做:
"foo_faa:fee,fii".replace("_", "").replace(":", "").replace(",", "")
just something like (with str.replace()
)就像(使用
str.replace()
)
"foo_faa:fee,fii".replace(["_", ":", ","], "")
An option that requires no looping or regular expressions is translate :不需要循环或正则表达式的选项是translate :
>>> "foo_faa:fee,fii".translate(str.maketrans('', '', "_:,"))
"foofaafeefii"
Note that for Python 2, the API is slightly different .请注意,对于 Python 2,API 略有不同。
Not directly with replace
, but you can build a regular expression with a character class for those characters and substitute all of them at once.不直接使用
replace
,但您可以为这些字符构建一个带有字符类的正则表达式,并一次替换所有这些字符。 This is likely to be more efficient than a loop, too.这也可能比循环更有效。
>>> import re
>>> re.sub(r"[_:,]+", "", "foo_faa:fee,fii")
'foofaafeefii'
You can try with a loop:您可以尝试使用循环:
replace_list = ["_", ":", ","]
my_str = "foo_faa:fee,fii"
for i in replace_list:
my_str = my_str.replace(i, "")
If your only goal is to replace the characters by "", you could try:如果您唯一的目标是用“”替换字符,您可以尝试:
''.join(c for c in "foo_faa:fee,fii" if c not in ['_',':',','])
Or alternatively using string.translate (with Python 2):或者使用string.translate (使用 Python 2):
"foo_faa:fee,fii".translate(None,"_:,")
You should use regex for such kind of operations您应该使用正则表达式进行此类操作
import re
s = "foo_faa:fee,fii"
print(re.sub("_*|:*|,*", "", s))
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