ast_func_parsing.py

import ast


code = """
import foo


a = 1 + 2
b = "a" + "b" * 3


func(1, "a", b=1, c="c")

hello({}, [], "a", "b")

func(1, specialarg="test2")

func(2)

"""

result = ast.parse(code)

for node in ast.walk(result):
    if isinstance(node, ast.Expr):
        if isinstance(node.value, ast.Call):
            func_name = node.value.func.id
            for keyword in node.value.keywords:
                if func_name == "func" and keyword.arg == "specialarg":
                    print(f'WARNING: "specialarg" on line number {node.lineno}')

print("--------")
for lineno, line in enumerate(code.splitlines(), start=1):
    print(f"{lineno:3} | {line}")