python traceback is missing line numbers, files

[ni-tterry]

The traceback display of the python katas isn't showing files or line counts, which makes debugging difficult.

This is what the traceback ends up looking like:

Traceback:
   in 
   in tower_builder
TypeError: can't multiply sequence by non-int of type 'float'

This is what it should look like:

def uh_oh():
    a = a

>>> uh_oh()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<stdin>", line 2, in uh_oh
UnboundLocalError: local variable 'a' referenced before assignment

To repro:
Raise any error (or cause an error to be raised) in any code block of any kata.

I don't think this is kata specific... this has been happening with every kata.

It doesn't appear to be a CSS or client side problem. Here's the source from the element:

<raw content="Traceback:
   in <module>
   in interpreter
UnboundLocalError: local variable 'a' referenced before assignment">Traceback:
   in <module>
   in interpreter
UnboundLocalError: local variable 'a' referenced before assignment</module></raw>

But for what it's worth: OS X 11.6, Chrome 55.0.2883.95

[kazk]

Currently, file names and line numbers are intentionally removed, so it's not CSS or browser issue.

// get rid of some of the noisy content. We remove line numbers since
// they don't match up to what the user sees and will only confuse them.

This is because Python tests are executed using concatenated file:

# python -c file.py / python3 -c file.py
try: from imp import reload
except: pass
reload(__import__('sys')).path.append('./frameworks/python')
reload(__import__('sys')).path.append('/home/codewarrior')

test = Test = reload(__import__('cw-2'))

# +Preloaded

# +Solution

# +Tests

I haven't looked into the reasons why it's done this way, but this needs to be improved first in order to enable useful tracebacks.

---

lib/runners/python.js

[ni-tterry]

Thanks! This would be a great improvement, especially for people who are just starting out, or for people working on the more complex katas.

[kazk]

The new runner avoids concatenation so it'll show line numbers with error messages.

def multiply(a, b):
    return a b

[kazk]

The new runner was deployed :) #1336