Why isn't IPython giving me a full traceback for a module I've written?

ipython, python, traceback

Solution

Did you try with `%xmode` ?

In [2]: %xmode?
Type:       Magic function
Definition: %xmode(self, parameter_s='')
Docstring:
Switch modes for the exception handlers.

Valid modes: Plain, Context and Verbose.

If called without arguments, acts as a toggle.

if you look carefully the 2 following example are different, but difference is more visible with long tracebacks :

In [8]: raise ValueError('Foo')
---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-8-05e81bf5c607> in <module>()
----> 1 raise ValueError('Foo')
        global ValueError = undefined

ValueError: Foo

Plain mode

In [9]: xmode
Exception reporting mode: Plain

In [10]: raise ValueError('Foo')
Traceback (most recent call last):
  File "<ipython-input-10-05e81bf5c607>", line 1, in <module>
    raise ValueError('Foo')
ValueError: Foo

Problem

I'm confused about why, when an error is raised in a function within a module I've written, IPython doesn't show me a full traceback with the line in the function that caused the error. Note: I'm not confused about the cause of this particular error, but about why IPython isn't showing me the cause. My module is called `module.py` and it contains the function `function`, underneath which is written an `if __name__ == '__main__'` block. (Module and function names have been changed to protect the identities of the innocent -- or maybe not so innocent.) Here's the traceback I get when an error is raised. (Note the lack of information about which line in `function` caused the error.) ``` In [1]: import module as m In [2]: call = m.function('hello') --------------------------------------------------------------------------- TypeError Traceback (most recent call last) <ipython-input-2-ec0c1e40ec8c> in <module>() ----> 1 call = m.function('hello') /home/module.py in function(greeting) TypeError: join() takes exactly one argument (2 given) ```

Original source