Make IPython show source code line where exception occurred

[Andreas Roehler]

http://stackoverflow.com/questions/23610179/make-ipython-show-source-code-line-where-exception-occurred/23625649#23625649

 IPython show source code line where exception occurred35
up vote36 2 down vote37 favorite38
3

I'm irritated by the following output that IPython gives me for an exception:

---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-3-4c27956d23f6> in <module>()
----> 1 parameterStudyPageRankNibble()

/Users/cls/Desktop/LFR/scripts/scd_experiments.py in parameterStudyPageRankNibble()

AttributeError: 'tuple' object has no attribute 'values'

    A line number from where the exception was raised would be really
    helpful. Why isn't it there?
    /Users/cls/Desktop/LFR/scripts/scd_experiments.py is not the path of the script which is executed. IPython somehow mixed together the path of the script file and the current working directory.

What can I do to get more helpful information when an exception is thrown?

[Andreas Roehler (a-roehler)]

Comment by user unutbu was:

This has to do with how you load the code into IPython. (It would be helpful if you told us how to reproduce your problem.) For example, if I use emacs's M-x py-execute-region, the region of code is copied to a temporary file and the IPython interpreter runs execfile on the temporary file.

When emacs/IPython is used in this manner, there is no useful traceback.

If instead, you import the script and then call the function:

import scd_experiments as SE
SE.parameterStudyPageRankNibble()

then you will see a useful traceback message.

Demo: script.py

def foo():
    1/0

If I select the region and call M-x py-execute-region,

In [15]: ## working on region in file /tmp/python-4126aNj.py...

In [16]: foo()
---------------------------------------------------------------------------
ZeroDivisionError Traceback (most recent call last)
<ipython-input-16-624891b0d01a> in <module>()
----> 1 foo()

/tmp/python-4126aNj.py in foo()

ZeroDivisionError: integer division or modulo by zero

;;;;;;;;;

Should not point to /tmp

[Andreas Roehler (a-roehler)]

Maybe py-execute-region should not use a temporary file by default?

[Andreas Roehler (a-roehler)]

fixed with r1499

[Andreas Roehler (a-roehler)]

Error still exists with Python3

Python 3.3.3 (v3.3.3:c3896275c0f6, Nov 18 2013, 21:18:40) [MSC v.1600 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "c:/Users/MYNAME/AppData/Local/Temp/C--Python33-python-3628OHj.py", line 1, in <module>
    1/0
ZeroDivisionError: division by zero
>>>