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Easy to use pattern matching and information extraction for Python
License: Other
This project forked from hgrecco/stringparser
Easy to use pattern matching and information extraction for Python
License: Other
Motivation ---------- The ``stringparser`` module provides a simple way to match patterns and extract information within strings. As patterns are given using the familiar format string specification :pep:`3101`, writing them is much easier than writing regular expressions (albeit less powerful). Examples -------- You can build a reusable parser object:: >>> parser = Parser('The answer is {:d}') >>> parser('The answer is 42') 42 >>> parser('The answer is 54') 54 Or directly:: >>> Parser('The answer is {:d}')('The answer is 42') 42 You can retrieve many fields:: >>> Parser('The {:s} is {:d}')('The answer is 42') ('answer', 42) And you can use numbered fields to order the returned tuple:: >>> Parser('The {1:s} is {0:d}')('The answer is 42') (42, 'answer') Or named fields to return an OrderedDict:: >>> Parser('The {a:s} is {b:d}')('The answer is 42') OrderedDict([('a', 'answer'), ('b', 42)]) You can ignore some fields using _ as a name:: >>> Parser('The {_:s} is {:d}')('The answer is 42') 42 Limitations ----------- - From the format string: `[[fill]align][sign][#][0][minimumwidth][.precision][type]` only `type`, `sign` and `#` are currently implemented. This might cause trouble to match certain notation like: - decimal: '-4' written as '- 4' - etc - Lines are matched from beginning to end. {:d} will NOT return all the numbers in the string. Use regex for that.
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