How can I highlight all function names in Python files?

Question

I try to make python.vim color similar to material theme (sublime text 3), see pictures: https://imgur.com/a/wOgH7

expected is material theme and current is mine.

You may noticed that all method, function for i.e: os.path.exists(replacement_file)

all os.path.exists and replacement_file are in green color but currently I can't do that with python.vim hacks.

Any help and suggestions is highly appreciated. thanks.

EDIT: to narrow down the situation, I have sample below:

basename = os.path.splitext(filename)[0]
 if(os.path.isfile(candidate) or os.path.isdir(candidate)):

Here I'm trying to match os.path.splitext and os.path.isfile and os.path.isdir that all the name of method or function.

What have I achieved so far?

I could match os.path.isfile with this regex (\()(\w+\.)*\w+\( but above regex will not match os.path.splitext and os.path.isdir that said have space before them. Any help?

Answer 1

A regexp that seems to work well is:

\v[[:alpha:]_.]+\ze(\s?\()

Or for syntax highlighting (see How can I add additional syntax highlighting rules in my local vimrc? on how to add this to your vimrc):

:syntax match pythonFunction /\v[[:alpha:]_.]+\ze(\s?\()/
:hi def link pythonFunction Function

To break it down:

• \v – "very magic" mode so we don't have to add so many backslashes.
• [[:alpha:]_.]+ – function name, any alphanumeric character, _, or . repeated 1 or more times.
• \ze – Match the following group "zero-width", meaning it won't be included in the match. This matters because otherwise the space and ( will be highlighted as well.
• ( – start subgroup, for the \ze.
• \s? – Optionally match any space.
• \( – match (.
• ) – end subgroup.