Python multi-line expressions and stack trace
===

We have a simple AssertTrue function used in our python project and I wanted to modify the output it provides to print the code statement from which it was called. The code looks something like this:

    1 import traceback
    2
    3 def AssertTrue(expr, reason=None):
    4     print traceback.format_stack()[-2]
    5
    6 AssertTrue(1 == 2,
    7         reason='One is not equal to two')


The output:

    File "/tmp/fisken.py", line 7, in <module>
      reason='One is not equal to two')

I'm wondering why traceback.format_stack only gives me the code on line 7. The statement starts on line 6 and the expression I would like to see in the output is also on that same line. Doesn't traceback handle multi-line function calls?

(Never mind that there are better ways to do AssertTrue(...). I'm just wondering why traceback.format_stack (and .extract_stack) does not behave as I expected it to)