Vim's advance word broken in python, how do I fix this?

Question

Vim works fine for all other languages, but word detection seems wonky in python. For example, in the following snippet, with the cursor on the 'h' in shutil, I would expect prssing the w key to advance me to the period, instead I get moved to the "'" in front of export.

shutil.copytree(os.path.join('export', 'app'), os.path.join('export', 'pacakge'))

Any idea what could cause this? How can I detect the cause? How can I fix it?

Answer 1

Look to see what the option "iskeyword" is set to. Chances are the Python syntax file is changing it. Normally it's set to @,48-57,_,192-255.