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latexcodec

A lexer and codec to work with LaTeX code in Python.

• Instead of using latexcodec, I encourage you to consider pylatexenc instead, which is far superior: https://github.com/phfaist/pylatexenc
• Download: http://pypi.python.org/pypi/latexcodec/#downloads
• Documentation: http://latexcodec.readthedocs.org/
• Development: http://github.com/mcmtroffaes/latexcodec/

The codec provides a convenient way of going between text written in LaTeX and unicode. Since it is not a LaTeX compiler, it is more appropriate for short chunks of text, such as a paragraph or the values of a BibTeX entry, and it is not appropriate for a full LaTeX document. In particular, its behavior on the LaTeX commands that do not simply select characters is intended to allow the unicode representation to be understandable by a human reader, but is not canonical and may require hand tuning to produce the desired effect.

The encoder does a best effort to replace unicode characters outside of the range used as LaTeX input (ascii by default) with a LaTeX command that selects the character. More technically, the unicode code point is replaced by a LaTeX command that selects a glyph that reasonably represents the code point. Unicode characters with special uses in LaTeX are replaced by their LaTeX equivalents. For example,

The decoder does a best effort to replace LaTeX commands that select characters with the unicode for the character they are selecting. For example,

In addition, comments are dropped (including the final newline that marks the end of a comment), paragraphs are canonicalized into double newlines, and other newlines are left as is. Spacing after LaTeX commands is also canonicalized.

For example,

hi % bye
there\par world
\textbf     {awesome}

is decoded as

hi there

world
\textbf {awesome}

When decoding, LaTeX commands not directly selecting characters (for example, macros and formatting commands) are passed through unchanged. The same happens for LaTeX commands that select characters but are not yet recognized by the codec. Either case can result in a hybrid unicode string in which some characters are understood as literally the character and others as parts of unexpanded commands. Consequently, at times, backslashes will be left intact for denoting the start of a potentially unrecognized control sequence.

Given the numerous and changing packages providing such LaTeX commands, the codec will never be complete, and new translations of unrecognized unicode or unrecognized LaTeX symbols are always welcome.