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"""A custom pygments lexer for IPython code cells.
Informs The pygments highlighting library of the quirks of IPython's superset
of Python -- magic commands, !shell commands, etc.
"""
#-----------------------------------------------------------------------------
# Copyright (c) 2013, the IPython Development Team.
#
# Distributed under the terms of the Modified BSD License.
#
# The full license is in the file COPYING.txt, distributed with this software.
#-----------------------------------------------------------------------------
#-----------------------------------------------------------------------------
# Imports
#-----------------------------------------------------------------------------
# Third-party imports
from pygments.lexers import PythonLexer, BashLexer
from pygments.lexer import bygroups, using
from pygments.token import Keyword, Operator, Text
#-----------------------------------------------------------------------------
# Class declarations
#-----------------------------------------------------------------------------
class IPythonLexer(PythonLexer):
"""
Pygments Lexer for use with IPython code. Inherits from
PythonLexer and adds information about IPython specific
keywords (i.e. magic commands, shell commands, etc.)
"""
#Basic properties
name = 'IPython'
aliases = ['ip', 'ipython']
filenames = ['*.ipy']
#Highlighting information
tokens = PythonLexer.tokens.copy()
tokens['root'] = [
(r'(\%+)(\w+)\s+(\.*)(\n)', bygroups(Operator, Keyword,
using(BashLexer), Text)),
(r'(\%+)(\w+)\b', bygroups(Operator, Keyword)),
(r'^(!)(.+)(\n)', bygroups(Operator, using(BashLexer), Text)),
] + tokens['root']
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