client.py

import subprocess
import json
import urllib.request

URL = "https://challange.oyk2019.ml"

def _find_author(filename, lineno):
    prop = subprocess.check_output(f"git blame -pL {lineno},{lineno} {filename}", shell = True)
    lines = prop.decode().split("\n")
    commit = lines[0].split()[0]
    author = lines[1].split()[1]
    return commit, author

def find_author(line):
    prop = subprocess.check_output(f"fgrep -rni {line!r} Python/", shell = True)
    filename, lineno, line = prop.decode().split("\n")[0].split(":")
    return _find_author(filename, lineno)

request = urllib.request.Request(url = URL)
request.add_header("User-Agent", "Monty Python")
with urllib.request.urlopen(request) as page:
    response = json.loads(page.read().decode())

challange, token, _ = response.values()
commit, author = find_author(challange)
request = urllib.request.Request(url = URL, data = json.dumps({"token": token, "commit": commit, "author": author}).encode(), method = "POST")
request.add_header("User-Agent", "Monty Python")
with urllib.request.urlopen(request) as page:
    response = json.loads(page.read().decode())
    
print(response)