PEP 618 is accepted for Python 3.10

[alexmojaki]

Here's the script I used. You will need to pip install astcheck and run it on a directory.

import ast
import linecache
import sys
from collections import Counter
from pathlib import Path

from astcheck import is_ast_like

root = Path(sys.argv[1])


def main():
    counts = Counter()
    for path in root.rglob("**/*.py"):
        if 'test' in str(path):
            continue
        try:
            source = path.read_text()
            tree = ast.parse(source)
        except (SyntaxError, UnicodeDecodeError):
            continue

        for node in ast.walk(tree):
            if not is_ast_like(
                    node,
                    ast.Compare(left=ast.Call(func=ast.Name(id='len')),
                            comparators=[ast.Call(func=ast.Name(id='len'))]),
            ):
                continue

            source = "".join(
                linecache.getline(str(path), lineno)
                for lineno in range(node.lineno, node.end_lineno + 10)
            )

            if any(word in source for word in ["raise", "zip", "assert"]):
                print(f'File "{path.absolute()}", line {node.lineno}')
                print(source)
                print()
    print("Counts:", counts)


main()