On 26/10/2011 20:48, Ross Boylan wrote:
I want to replace every \ and " (the two characters for backslash and
double quotes) with a \ and the same character, i.e.,
\ -> \\
" -> \"
I have not been able to figure out how to do that. The documentation
for re.sub says "repl can be a string or a function; if it is a string,
any backslash escapes in it are processed.That is, \n is converted to a
single newline character, \r is converted to a carriage return, and so
forth. Unknown escapes such as \j are left alone."
\\ is apparently unknown, and so is left as is. So I'm unable to get a
single \.
[snip]
The backspace character is also used for escaping in a regex, so you
need to escape it with a backslash:
>>> print('Silly " quote or \\ backslash')
Silly " quote or \ backslash
>>> print (re.sub(r'([\\\\"])', r"\\\1", 'Silly " quote or \\ backslash'))
Silly \" quote or \\ backslash
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