Is there a way to highlight function calls using Pygments (or another library)?

Question

I was quite disappointed to discover that functions calls were not highlighted using Pygments.

See it online (I tested it with all available styles)

Builtin functions are highlighted but not mine.

I looked at the tokens list but there is no reference to "function call" or "object attribute" for example.

I have considered extending the lexer by adding a regex rule like \w+\(.*?\). But I am afraid to multiply the errors because of edge cases I did not think of.

Do you know why this feature is not implemented directly inside Pygments?

Answer 1

If you have a specific list of functions you want highlighted, you can add a custom highlighter like the builtin NumPyLexer:

from pygments.lexers.python import PythonLexer
from pygments.token import Keyword, Name, String

class MyFuncLexer(PythonLexer):
    name = 'MyFuncPython'
    aliases = ['myfuncpython']

    # override the mimetypes to not inherit them from python
    mimetypes = []
    filenames = []

    EXTRA_KEYWORDS = {
        'func'
    }

    def get_tokens_unprocessed(self, text):
        for index, token, value in \
                PythonLexer.get_tokens_unprocessed(self, text):
            if token is Name and value in self.EXTRA_KEYWORDS:
                yield index, Keyword.Pseudo, value
            else:
                yield index, token, value