1. When you create new project from folder, include only file extension you want
in projects in Project from Folder dialog. Fill in list exclude your *.PYC
files.
In the File explorer is combobox on the top - you can choose Python files only.
Predefined extensions are PY and PYW. List of extension you can change in the
menu settings / Highlighter settings / Python

2. new file templates are located in .\PSPad\Template folder. Edit file
Default.PY or any other extension you need. You can create another templates and
call it using menu File / New dialog or Ctrl+N

3. In the highlighter settings / Python (second tab) fill in char ":" into
Extended indent chars first edit field

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