Handle files created on the fly. about python-packaging

[storborg]

This isn't really something that Python has strong conventions for, but personally I think:

• It is generally harmful to write to any files inside the installed package itself: sometimes, it will be installed as a zip file (although this can be disabled in setup.py), and it is often not user-writeable.
• If it's a temporary file, use the tempfile module.
• If it's user-specific, use a dotfile (e.g. /home/someuser/.mypackagename). This is a location that's both un-surprising to the user and is very likely to succeed without permissions errors. You should get the path to the home directory with os.path.expanduser("~") so that it's cross-platform. If you need multiple files, make .mypackagename a directory instead, and put files inside it.
• If it's system-wide, you probably have to at least prompt the user before writing, since there isn't a consistent system-wide path that the user is likely to have write permissions for. You may be able to default to something like /usr/local/share/mypackagename on POSIX systems.

Also, those files should not be defined in setup.py at all: your setup.py should only reference read-only files which are included with the package.

[iCHAIT]

Thanks a lot 👍

FIxed using os.path.expanduser("~")