No line number shown for run-time error from Python module -


most python errors produce traceback showing line number of offending statement. reason run-time errors not.

for instance, running "python -m mymodule.py" on module containing 2 lines:

args = {} if len(args > 2): print("this run-time error. should be: len(args) > 2")

fails with:

c:\python34\python.exe: error while finding spec 'mymodule.py' (<class 'typeerror'>: unorderable types: dict() > int())

this sample of code larger module failed and, having no line number made hard find coding error.

when use -m, python searches sys.path module, , it's not finding file specified. because path doesn't (and reasons of stability , security shouldn't) include current working directory.

since error produced @ command line rather inside file, there no line number error.

finally, fix problem, type

python -m ./mymodule

this fixes 2 problems command line:

  1. the .py extension omitted when doing module import.

  2. you need explicitly add path in order import module (or move directory in sys.path).


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