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Description:
cypunct 0.1.1
Cypunct is designed to solve the problem of quickly splitting a Unicode
string based on a set of characters.
Cypunct is designed to work on Python 2.6, 2.7, and 3.3+. Because
Cypunct is a Cython extension, it will (probably) only work in the CPython
runtime.
For Python versions 2.6 and 2.7, Cypunct will only run if these
CPython runtimes are compiled with the flag
--enable-unicode=ucs4. Cypunct will throw an exception
if your Python 2 runtime was not compiled with UCS-4.
Installation
Installation is easiest with pip. Just run
pip install cypunct
Usage
Cypunct takes a Unicode string and a frozenset of delimiter characters,
and splits the string based on that set. Every delimiter character
should be a single Unicode code point – len(char) should be 1.
A simple example, where we provide a small frozenset is below.
>>> from cypunct import split
>>> split("James Mishra is the... best human ever, or so I think.", frozenset({' ', '.', ','}))
['James', 'Mishra', 'is', 'the', 'best', 'human', 'ever', 'or', 'so', 'I', 'think', '']
However, if you only need to split on whitespace characters, str.split() much
better performance. If you only need to split on one character, str.split(char)
will also be much faster.
Cypunct really shines when you need to split on many possible characters,
such as an entire Unicode character category.
The below example splits on all Unicode punctuation, and nothing else.
>>> from cypunct.unicode_classes import P
>>> split("James Mishra is the... best human ever, or so I think.", P)
['James Mishra is the', ' best human ever', ' or so I think', '']
The following Unicode classes are available as sets:
Category
Description
C
Other
Cc
Other, Format
Cf
Other, Not Assigned
Co
Other, Private Use
Cs
Other, Surrogate
L
Letter
Ll
Letter, Lowercase
Lm
Letter, Modifier
Lo
Letter, Other
Lt
Letter, Titlecase
Lu
Letter, Uppercase
M
Mark
Mc
Mark, Space Combining
Me
Mark, Enclosing
Mn
Mark, Nonspacing
N
Number
Nd
Number, Decimal Digit
Nl
Number, Letter
No
Number, Other
P
Punctuation
Pc
Punctuation, Connector
Pd
Punctuation, Dash
Pe
Punctuation, Close
Pf
Punctuation, Final Quote
Pi
Punctuation, Initial Quote
Po
Punctuation, Other
Ps
Punctuation, Open
S
Symbol
Sc
Symbol, Currency
Sk
Symbol, Modifier
Sm
Symbol, Math
So
Symbol, Other
Z
Separator
Zl
Separator, Line
Zp
Separator, Paragraph
Zs
Separator, Space
cypunct.unicode_classes.COMMON_SEPARATORS is the union of the C, P, S, and Z
frozensets. I have found it personally useful when splitting text for natural
language processing applications.
If you don’t specify a frozenset for Cypunct to use, then Cypunct will
default to COMMON_SEPARATORS.
Updating Unicode data
Currently, cypunct.unicode_classes is a Python module autogenerated from a
UnicodeData.txt file. The autogeneration script exists in
make_punctuation_file.py.
Most Cypunct users will not need to concern themselves with this, but this is important
to know if you are experiencing Unicode bugs or want to contribute to Cypunct.
The current UnicodeData.txt is from ftp://ftp.unicode.org/Public/10.0.0/ucd/UnicodeData.txt.
Frequently Asked Questions (FAQ)
Q: I got an installation error involving
“pkg_resources.VersionConflict (setuptools xx.xx.xx”.
How do I fix this?
You have a very old version of setuptools, and we won’t be able to
compile our Cython extension with it. Run
pip install --upgrade setuptools and try installing Cypunct again.
Q: Wouldn’t this be way faster if it were written in Pure C?
Yes, it would. I’m too lazy to hand-code a C CPython extension, but it’s on my todo list.
Right now, Cypunct is “fast enough”, and I can move onto other things in my
daily life.
However, if you want to take on the challenge of rewriting Cypunct in C and having
the exact same functionality as the current Cython version, I’ll send you $100 USD.
License
For personal and professional use. You cannot resell or redistribute these repositories in their original state.
Files:
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