44 lines
1.5 KiB
Python
44 lines
1.5 KiB
Python
# This file is part of Patsy
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# Copyright (C) 2012 Nathaniel Smith <njs@pobox.com>
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# See file LICENSE.txt for license information.
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# This file contains compatibility code for supporting old versions of Python
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# and numpy. (If we can concentrate it here, hopefully it'll make it easier to
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# get rid of weird hacks once we drop support for old versions).
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##### Numpy
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import os
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# To force use of the compat code, set this env var to a non-empty value:
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optional_dep_ok = not os.environ.get("PATSY_AVOID_OPTIONAL_DEPENDENCIES")
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##### Python standard library
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# The Python license requires that all derivative works contain a "brief
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# summary of the changes made to Python". Both for license compliance, and for
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# our own sanity, therefore, please add a note at the top of any snippets you
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# add here explaining their provenance, any changes made, and what versions of
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# Python require them:
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# OrderedDict is only available in Python 2.7+. compat_ordereddict.py has
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# comments at the top.
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import collections
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if optional_dep_ok and hasattr(collections, "OrderedDict"):
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from collections import OrderedDict
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else:
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from patsy.compat_ordereddict import OrderedDict
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# 'raise from' available in Python 3+
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import sys
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from patsy import PatsyError
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def call_and_wrap_exc(msg, origin, f, *args, **kwargs):
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try:
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return f(*args, **kwargs)
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except Exception as e:
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new_exc = PatsyError("%s: %s: %s" % (msg, e.__class__.__name__, e), origin)
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raise new_exc from e
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