Originally reported by: Anonymous
With Python 3, py.test doesn't propery display exception chains. The following script
#!python
def test_chained_exception():
try:
raise ValueError(17)
except Exception as exc:
raise ValueError(23) from exc
if __name__ == "__main__":
test_chained_exception()
when run with Python 3.2 properly outputs the exception chain:
$ python3.2 ~/bug.py
Traceback (most recent call last):
File "/Users/walter/bug.py", line 3, in test_chained_exception
raise ValueError(17)
ValueError: 17
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/Users/walter/bug.py", line 8, in <module>
test_chained_exception()
File "/Users/walter/bug.py", line 5, in test_chained_exception
raise ValueError(23) from exc
ValueError: 23
but when run unter py.test only the outermost exception is displayed:
$ python3.2 -mpytest bug.py
================ test session starts ================
platform darwin -- Python 3.2.2 -- pytest-2.1.2
collected 1 items bug.py F
====================== FAILURES =====================
_______________ test_chained_exception ______________
def test_chained_exception():
try:
raise ValueError(17)
except Exception as exc:
> raise ValueError(23) from exc
E ValueError: 23
bug.py:5: ValueError
============= 1 failed in 0.01 seconds ==============
Originally reported by: Anonymous
With Python 3, py.test doesn't propery display exception chains. The following script
when run with Python 3.2 properly outputs the exception chain:
but when run unter py.test only the outermost exception is displayed: