/usr/lib/python2.7/dist-packages/jujubundlelib/pyutils.py is in python-jujubundlelib 0.4.1-0ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | # Copyright 2015 Canonical Ltd.
# Licensed under the AGPLv3, see LICENCE file for details.
import sys
# Report whether we are using Python 3 or Python 2.
PY3 = sys.version_info >= (3, 0)
def string_class(cls):
"""Define __unicode__ and __str__ methods on the given class in Python 2.
The given class must define a __str__ method returning a unicode string,
otherwise a TypeError is raised.
Under Python 3, the class is returned as is.
"""
if not PY3:
if '__str__' not in cls.__dict__:
raise TypeError('the given class has no __str__ method')
cls.__unicode__, cls.__string__ = (
cls.__str__, lambda self: self.__unicode__().encode('utf-8'))
return cls
def exception_string(exception):
"""Return the string value of an exception, valid for both python 2 and
python 3.
"""
return exception.args[0].decode('utf-8')
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