Find a SLOC

Your Python interpreter says:

Traceback (most recent call last):
  File "", line 102, in <module>
    if re.match(regular_expression, string):
TypeError: expected string or buffer

While you obviously passed an object of wrong type to re.match function, you want to know of what type exactly. You finally fix the error in your source code, but you figure a more verbose TypeError message would help you trace such bugs in the future:

TypeError: expected string or buffer; got <type> instead

You decide to submit a bug report (or a wishlist item, since your report is about a feature extension) against the Python interpreter (CPython) source tree, so the project maintainers can fix it.


  1. Find the source line of code (in Python’s source) that results in above TypeError exception.
  2. Submit a bug report to Python’s issue tracker.

What you will learn