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 \. Here are some tries in Python 2.5.2. The document suggested the result of a function might not be subject to the same problem, but it seems to be. >>> def f(m): ... return "\\"+m.group(1) ... >>> re.sub(r"([\\\"])", f, 'Silly " quote') 'Silly \\" quote' >>> re.sub(r"([\\\"])", r"\\1", 'Silly " quote') 'Silly \\1 quote' >>> re.sub(r"([\\\"])", "\\\\1", 'Silly " quote') 'Silly \\1 quote' >>> re.sub(r"([\\\"])", "\\\\\1", 'Silly " quote') 'Silly \\\x01 quote' >>> re.sub(r"([\\\"])", "\\\\\\1", 'Silly " quote') 'Silly \\" quote' Or perhaps I'm confused about what the displayed results mean. If a string has a literal \, does it get shown as \\? I'd appreciate it if you cc me on the reply. Thanks. Ross Boylan -- http://mail.python.org/mailman/listinfo/python-list
