替换python / pandas中的反斜杠

Question

I am trying to replace some \\ characters with / in some csv files (because I'm moving from windows to linux and need to modify pathnames that are listed in the .csv files.).

I have this:

 import pandas as pd
 file = 'my_file.csv'
 df = pd.read_csv(file)
 df = df.replace('\','/')
 df.to_csv(file)

but I get this error:

file "<ipython-input-29-9556415d69a6>", line 5
    df = df.replace('\','/')
                            ^
SyntaxError: EOL while scanning string literal

I can replace any other character but teh \\ causes problems, presumably because it is trying to interpret the string as a path?

What am I doing wrong??

Answer 1

When using or referring a backslash in a string ( \\ ), it has to be escaped by another backslash:

>>> s = '\just some test\'
SyntaxError: EOL while scanning string literal
>>> s = '\\just some test\\'
>>> s.replace('\\', '/')
'/just some test/'

Python lexical analysis - String literals

The backslash (\\) character is used to escape characters that otherwise have a special meaning, such as newline, backslash itself, or the quote character.