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"""

reST directive for syntax-highlighting ipython interactive sessions.

"""

from sphinx import highlighting

from IPython.lib.lexers import IPyLexer

def setup(app):

"""Setup as a sphinx extension."""

# This is only a lexer, so adding it below to pygments appears sufficient.

# But if somebody knows what the right API usage should be to do that via

# sphinx, by all means fix it here. At least having this setup.py

# suppresses the sphinx warning we'd get without it.

metadata = {'parallel_read_safe': True, 'parallel_write_safe': True}

return metadata

# Register the extension as a valid pygments lexer.

# Alternatively, we could register the lexer with pygments instead. This would

# require using setuptools entrypoints: http://pygments.org/docs/plugins

ipy2 = IPyLexer(python3=False)

ipy3 = IPyLexer(python3=True)

highlighting.lexers['ipython'] = ipy2

highlighting.lexers['ipython2'] = ipy2

highlighting.lexers['ipython3'] = ipy3