I have a Python script that is working fine from Processing->Toolbox->User Scripts. However, I have put some user defined functions in "my_functions.py" that I can call from "Timing_Advance.py".

The problem is, when I edit the functions in "my_functions.py" in the QGIS script editor, I have to restart QGIS for the changes to take effect. This is perhaps because, when I restart QGIS, it makes a "my_fucntions.pyc" file and keeps it in the same location. The .pyc file is not update when I edit the user defined functions in "my_functions.py".

How can I update the my_functions.pyc file after editing, without having to restart QGIS?

UPDATE 24th Jan 2017 Looks like including the following lines isn't making any difference either

import sys
import py_compile

import my_functions

If I add some dummy lines like a "print" and re-run the script, the print doesn't give the desired output, till I re-start QGIS

1 Answer 1


Try using the following:

import py_compile
  • i added the suggested lines and then I added a dummy piece of code print "hi" in my_functions.py. if the code worked then I would have seen the response in the python console, but nope
    – user80602
    Jan 23, 2017 at 14:37
  • 1
    @Arindam - Hmm, perhaps this post might help: Re-import custom functions without restarting QGIS
    – Joseph
    Jan 24, 2017 at 12:37
  • I must be missing something elementary. I added these lines import imp, my_functions imp.reload(my_functions) from my_functions import * but now I get the error "See log for Details"
    – user80602
    Jan 26, 2017 at 4:31
  • 1
    Thanks for the tip. I just removed "imp" and it worked like a charm. Found the answer here <stackoverflow.com/questions/1517038/python-refresh-reload>
    – user80602
    Jan 27, 2017 at 7:38
  • @Arindam - Ahh well done for solving your problem! You should post it as an answer and accept it by clicking the green-faded tick :)
    – Joseph
    Jan 27, 2017 at 9:32

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