Define "malfunction". Are we supposed to know what your code is meant to do, as well as what it actually does?

Please don't use the bug tracker as a help desk for your own scripts. There are many forums where you can ask for help, such as the mailing lists, the Python Discuss forum, Stackoverflow, Reddit's r/learnpython etc.

If you are going to submit something here as a bug, please ensure that:

(1) it actually is a bug in the Python interpreter first, rather than a bug in your own code; and 

(2) you provide a MINIMAL example, with a description of the expected output, a reason why you expect it, and the actual output.

It may help for you to read this: http://sscce.org/