Using Pyinstaller On Parmap Causes A Tkinter Matplotlib Import Error. Why?

Update If I try downgrading from Pyinstaller 3.2 to 3.1 I instead get the following traceback when I try to run the executable. I tried adding --hidden-import=collect_submodules('

Solution 1:

Repiklis provided the solution in the comments. Further note that as of January 15 2017 Pyinstaller version 3.2.1 was released. I now use this and it solves this issue along with others like this and this that I could previously only solve by using the developer version. So I highly recommend upgrading to the latest version if you haven't already.