regular expression - Printable Version

regular expression - Printable Version

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regular expression - bluefrog - Jun-03-2018

Hi

How can one escape the "\" character?

Escaping the "^" character works fine

>>> import re
>>> re.findall(re.escape("^"), "^hello^")
['^', '^']

But when escaping the "\" character I get an error:

>>> re.findall(re.escape("\"), "\hello\")
  File "<stdin>", line 1
    re.findall(re.escape("\"), "\hello\")

Thanks

Hi

discovered the answer here

RE: regular expression - perfringo - Jun-09-2018

From Python documentation: re - Regular expression operations::

Quote:The solution is to use Python’s raw string notation for regular expression patterns; backslashes are not handled in any special way in a string literal prefixed with 'r'. So r"\n" is a two-character string containing '\' and 'n', while "\n" is a one-character string containing a newline. Usually patterns will be expressed in Python code using this raw string notation.