如何替换字符串中的多个字符?
请帮助修复脚本
我需要在行“name”中将特殊字符替换为短语“special char”
newName = replace(name, ['\', '/', ':', '*', '?', '"', '<', '>', '|'], 'special char')
但是我收到了消息:
语法无效
答案 0 :(得分:12)
您可以使用re.sub():
import re
newName = re.sub('[\\\\/:*?"<>|]', 'special char', name)
答案 1 :(得分:8)
您可以使用str.translate
和dictionary comprehension:
>>> name = ":1?2/3<4|5"
>>> bad = ['\\', '/', ':', '*', '?', '"', '<', '>', '|']
>>> newName = name.translate({ord(c):'special char' for c in bad})
>>> newName
'special char1special char2special char3special char4special char5'
>>>
如果您使用timeit.timeit
,您会发现此方法通常比其他方法更快:
>>> from timeit import timeit
>>> name = ":1?2/3<4|5"
>>> bad = ['\\', '/', ':', '*', '?', '"', '<', '>', '|']
>>>
>>> timeit("import re;re.sub('[\\/:*?\"<>|]', 'special char', name)", "from __main__ import name")
11.773986358601462
>>>
>>> timeit("for char in bad: name = name.replace(char, 'special char')", "from __main__ import name, bad")
9.943640323001944
>>>
>>> timeit("name.translate({ord(c):'special char' for c in bad})", "from __main__ import name, bad")
9.48467780122894
>>>
答案 2 :(得分:3)
>>> rep_chars = ['\\', '/', ':', '*', '?', '"', '<', '>', '|']
>>> name = "/:*?\"<>name"
>>> for char in rep_chars:
... name = name.replace(char,'')
...
>>> name
'name'