import re
from typing import Tuple, List

# Matches "foo" in "foo, bar" but not "foobar". Used to search for the
# occurrence of a parameter in the derivative formula
IDENT_REGEX = r'(^|\W){}($|\W)'

# TODO: Use a real parser here; this will get bamboozled
def split_name_params(schema: str) -> Tuple[str, List[str]]:
    m = re.match(r'(\w+)(\.\w+)?\((.*)\)', schema)
    if m is None:
        raise RuntimeError(f'Unsupported function schema: {schema}')
    name, _, params = m.groups()
    return name, params.split(', ')