tahoe-lafs/trac-2024-07-25

allmydata/init.py has surprising side-effects #2931

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opened 2018-06-18 14:41:49 +00:00 by exarkun · 1 comment

exarkun commented

2018-06-18 14:41:49 +00:00

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I can't explain what's going on yet but I'm fairly sure that whatever it is, it is bad and should be fixed:

$ python -c 'from twisted.trial._dist.workerreporter import *'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "local/lib/python2.7/site-packages/twisted/trial/_dist/workerreporter.py", line 15, in <module>
    from twisted.trial.reporter import TestResult
  File "local/lib/python2.7/site-packages/twisted/trial/reporter.py", line 29, in <module>
    from twisted.trial.unittest import makeTodo
  File "local/lib/python2.7/site-packages/twisted/trial/unittest.py", line 16, in <module>
    from twisted.trial._asyncrunner import (
  File "local/lib/python2.7/site-packages/twisted/trial/_asyncrunner.py", line 16, in <module>
    from twisted.trial import itrial, reporter
ImportError: cannot import name reporter
$ python -c 'import allmydata; from twisted.trial._dist.workerreporter import *'
$

Supposition: An import of allmydata should have no observable consequences for a subsequent import of any twisted module (or, arguably, any module outside of allmydata).

I can't explain what's going on yet but I'm fairly sure that whatever it is, it is bad and should be fixed: ``` $ python -c 'from twisted.trial._dist.workerreporter import *' Traceback (most recent call last): File "<string>", line 1, in <module> File "local/lib/python2.7/site-packages/twisted/trial/_dist/workerreporter.py", line 15, in <module> from twisted.trial.reporter import TestResult File "local/lib/python2.7/site-packages/twisted/trial/reporter.py", line 29, in <module> from twisted.trial.unittest import makeTodo File "local/lib/python2.7/site-packages/twisted/trial/unittest.py", line 16, in <module> from twisted.trial._asyncrunner import ( File "local/lib/python2.7/site-packages/twisted/trial/_asyncrunner.py", line 16, in <module> from twisted.trial import itrial, reporter ImportError: cannot import name reporter $ python -c 'import allmydata; from twisted.trial._dist.workerreporter import *' $ ``` Supposition: An import of `allmydata` should have no observable consequences for a subsequent import of any `twisted` module (or, arguably, any module outside of `allmydata`).

tahoe-lafs added the

labels 2018-06-18 14:41:49 +00:00

tahoe-lafs added this to the undecided milestone 2018-06-18 14:41:49 +00:00

exarkun commented

2018-08-01 14:41:58 +00:00

Author

Owner

This seems to be down to the difference between:

python -c 'from twisted.trial._dist.workerreporter import *'

and

python -c 'import twisted.trial.unittest; from twisted.trial._dist.workerreporter import *'

Therefore, this is really a Twisted problem and Tahoe-LAFS is just feelings the effects of it.

This seems to be down to the difference between: > python -c 'from twisted.trial._dist.workerreporter import *' and > python -c 'import twisted.trial.unittest; from twisted.trial._dist.workerreporter import *' Therefore, this is really a Twisted problem and Tahoe-LAFS is just feelings the effects of it.

tahoe-lafs added the

somebody else's problem

label 2018-08-01 14:41:58 +00:00

exarkun closed this issue

2018-08-01 14:41:58 +00:00