如何在字符串末尾替换反斜杠？

Question

I'm trying to replace a string in Python in a pandas column, from 'EXAMPLE\' to blank, the code I used is below:

df[<column_name>].str.replace('EXAMPLE\\', '')

however I would get the error "re.error: bad escape (end of pattern) at position 7"

If I do df[<column_name>].str.replace('EXAMPLE', '') it works completely fine, anyway to do this?

Answer 1

By default, pandas.Series.str.replace does regex substitution, not string replacement. It delegates to re.sub , not str.replace . If you want to use non-regex mode, pass regex=False :

df[whatever].str.replace('EXAMPLE\\', '', regex=False)

Alternatively, you could use a valid regex. The regex engine does its own backslash processing, so you need to use a raw string literal to avoid Python's own backslash processing:

df[whatever].str.replace(r'EXAMPLE\\', '')

See the pandas.Series.str.replace docs for other arguments and more examples.