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venv/Lib/site-packages/nbconvert/preprocessors/latex.py

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+"""Module that allows latex output notebooks to be conditioned before
+they are converted.
+"""
+#-----------------------------------------------------------------------------
+# 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
+#-----------------------------------------------------------------------------
+
+from __future__ import print_function, absolute_import
+
+from .base import Preprocessor
+from traitlets import Unicode
+
+#-----------------------------------------------------------------------------
+# Classes
+#-----------------------------------------------------------------------------
+
+class LatexPreprocessor(Preprocessor):
+    """Preprocessor for latex destined documents.
+    
+    Mainly populates the ``latex`` key in the resources dict,
+    adding definitions for pygments highlight styles.
+    """
+
+    style = Unicode('default',
+            help='Name of the pygments style to use'
+    ).tag(config=True)
+
+    def preprocess(self, nb, resources):
+        """Preprocessing to apply on each notebook.
+
+        Parameters
+        ----------
+        nb : NotebookNode
+            Notebook being converted
+        resources : dictionary
+            Additional resources used in the conversion process.  Allows
+            preprocessors to pass variables into the Jinja engine.
+        """
+        # Generate Pygments definitions for Latex
+        from pygments.formatters import LatexFormatter
+        
+        resources.setdefault("latex", {})
+        resources["latex"].setdefault("pygments_definitions", LatexFormatter(style=self.style).get_style_defs())
+        resources["latex"].setdefault("pygments_style_name", self.style)
+        return nb, resources