Python: Regular expression matches backslash "\"

Python Regular expression matches backslash "\"

eg

>>>a= ' w\w\w '

' w\\w\\w ' # printed "\ \" is escaped to a backslash "\"

If you need to match string A, you need to match a backslash "\"

>>>re.split (r ' \ \ \ ', a)

[' W ', ' W ', ' W ',]

Escaping the string first and then escaping the regular expression

Because all the characters in the original string are used directly in literal sense, do not escape the special characters, so do not escape the string, directly into the second ' regular escape ', in the regular escape "\ \" is escaped to "\", indicating that the type needs to match a backslash

If there is inappropriate place, also hope to contain and point out, thanks.

Reference from http://blog.csdn.net/jinixin/article/details/56705284

Python: Regular expression matches backslash "\"