code: def generate(password, uri):
      
      realm = extract_domain(uri)
      if password.startswith(_password_prefix):
          password = password[len(_password_prefix):]
  
      password_hash = b64_hmac_md5(password.encode("utf-8"), realm.encode("utf-8"))
      size = len(password) + len(_password_prefix)
      nonalphanumeric = len(re.findall(r'\W', password)) != 0
  
      return apply_constraints(password_hash, size, nonalphanumeric)
docs: generate the pwdhash password for master password and uri or
      domain name.