import json
from argparse import ArgumentParser
from pathlib import Path
from typing import Counter


def main():
    parser = ArgumentParser()
    parser.add_argument("path", type=Path)
    args = parser.parse_args()

    chars = Counter[str]()
    with open(args.path) as f:
        print("Reading lines")
        for line in f:
            content = json.loads(line)["content"]
            chars += Counter(content)

    for c in "()[]{}<>":
        print(f"{c} - {chars[c]:6}")


if __name__ == "__main__":
    main()