ENH: Include sharedoc function

tests/utils/test_sharedoc.py

@@ -0,0 +1,21 @@
+from zipline.testing import ZiplineTestCase
+from zipline.utils.sharedoc import copydoc
+
+
+class TestSharedoc(ZiplineTestCase):
+
+    def test_copydoc(self):
+        def original_docstring_function():
+            """
+            My docstring brings the boys to the yard.
+            """
+            pass
+
+        @copydoc(original_docstring_function)
+        def copied_docstring_function():
+            pass
+
+        self.assertEqual(
+            original_docstring_function.__doc__,
+            copied_docstring_function.__doc__
+        )

zipline/pipeline/engine.py

@@ -12,7 +12,6 @@ from six import (
     with_metaclass,
 )
 from numpy import array
-from odo.utils import copydoc
 from pandas import DataFrame, MultiIndex
 from toolz import groupby, juxt
 from toolz.curried.operator import getitem
@@ -30,6 +29,7 @@ from .term import AssetExists, InputDates, LoadableTerm
 
 from zipline.utils.date_utils import compute_date_range_chunks
 from zipline.utils.pandas_utils import categorical_df_concat
+from zipline.utils.sharedoc import copydoc
 
 
 class PipelineEngine(with_metaclass(ABCMeta)):

zipline/utils/sharedoc.py

@@ -5,6 +5,7 @@ across different functions.
 import re
 from six import iteritems
 from textwrap import dedent
+from toolz import curry
 
 PIPELINE_DOWNSAMPLING_FREQUENCY_DOC = dedent(
     """\
@@ -98,3 +99,21 @@ def templated_docstring(**docs):
         f.__doc__ = format_docstring(f.__name__, f.__doc__, docs)
         return f
     return decorator
+
+
+@curry
+def copydoc(from_, to):
+    """Copies the docstring from one function to another.
+    Parameters
+    ----------
+    from_ : any
+        The object to copy the docstring from.
+    to : any
+        The object to copy the docstring to.
+    Returns
+    -------
+    to : any
+        ``to`` with the docstring from ``from_``
+    """
+    to.__doc__ = from_.__doc__
+    return to