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import __builtin__, sys
import py
from py.__.magic import exprinfo
BuiltinAssertionError = __builtin__.AssertionError
class AssertionError(BuiltinAssertionError):
def __init__(self, *args):
BuiltinAssertionError.__init__(self, *args)
if args:
self.msg = str(args[0])
else:
f = sys._getframe(1)
try:
source = py.code.Frame(f).statement
source = str(source.deindent()).strip()
except py.error.ENOENT:
source = None
# this can also occur during reinterpretation, when the
# co_filename is set to "<run>".
if source:
self.msg = exprinfo.interpret(source, f, should_fail=True)
if not self.args:
self.args = (self.msg,)
else:
self.msg = None
def invoke():
py.magic.patch(__builtin__, 'AssertionError', AssertionError)
def revoke():
py.magic.revert(__builtin__, 'AssertionError')
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