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Project Description

Bi-directional (BiDi) layout implementation in pure python

Package documentation

API

The algorithm starts with a single entry point bidi.algorithm.get_display.

Required arguments:

  • unicode_or_str: The orginal unicode or string (i.e: storage). If it’s a string use the optional argument encoding to specify it’s encoding.

Optional arguments:

  • encoding: If unicode_or_str is a string, specifies the encdoing. The algorithm uses unicodedata which requires unicode. This encoding will be used to decode and encode back to string before returning (default: “utf-8”).
  • upper_is_rtl: True to treat upper case chars as strong ‘R’ for debugging (default: False).
  • base_dir: ‘L’ or ‘R’, override the calculated base_level.
  • debug: True to display (using sys.stderr) the steps taken with the algorithm (default: False).

Returns the display layout, either as unicode or encoding encoded string (depending on the type of unicode_or_str').

Example:

>>> from bidi.algorithm import get_display
>>> get_display(u'car is THE CAR in arabic', upper_is_rtl=True)
u'car is RAC EHT in arabic'

CLI

pybidi is a command line utility (calling bidi.main) for running the bidi algorithm. the script can get a string as a parameter or read text from stdin. Usage:

$ pybidi -h
Usage: pybidi [options]

Options:
  -h, --help            show this help message and exit
  -e ENCODING, --encoding=ENCODING
                        Text encoding (default: utf-8)
  -u, --upper-is-rtl    treat upper case chars as strong 'R' for debugging
                        (default: False).
  -d, --debug           Output to stderr steps taken with the algorithm
  -b BASE_DIR, --base-dir=BASE_DIR
                        Override base direction [L|R]

Examples:

$ pybidi -u 'car is THE CAR in arabic'
car is RAC EHT in arabic

$ cat ~/Documents/example.txt | pybidi
...

Installation

See docs/INSTALL.rst

Running tests

To run the tests:

python setup.py test

Some explicit tests are failing right now (see TODO)

History

0.4.0

  • Move to cookiecutter template
  • Python 3 support (py2.6, 2.7, 3.3, 3.4 and pypy)
  • Better docs
  • Travis integration
  • Tox tests
  • PEP8 cleanup

0.3.4

  • Remove extra newline in console script output

0.3.3

  • Implement overriding base paragraph direction
  • Allow overriding base direction in pybidi console script
  • Fix returning display in same encoding

0.3.2

  • Test for surrogate pairs
  • Fix indentation in documentations
  • Specify license in setup.py

0.3.1

  • Added missing description
  • docs/INSTALL.rst

0.3

  • Apply bidi mirroring
  • Move to back function based implementation

0.2

  • Move the algorithm to a class based implementation

0.1

  • Initial release
Release History

Release History

0.4.0

This version

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0.3.4

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0.3.3

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0.3.2

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0.3.1

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0.3

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
python_bidi-0.4.0-py2.py3-none-any.whl (17.8 kB) Copy SHA256 Checksum SHA256 3.4 Wheel Sep 15, 2015
python-bidi-0.4.0.tar.gz (38.6 kB) Copy SHA256 Checksum SHA256 Source Sep 15, 2015

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