is_whatsapp_message.py

def ismessage(self, str):
  patterns = {
    "pattern1":r'(\d{1,2}/\d{1,2}/\d{2,4}),\s+(\d{2}:\d{2})\s*-\s*(\w*\s*\w*)\s*:\s*(.*)'
  }
  for key in patterns:
      r = re.search(patterns[key], str)

      if r != None:
          date = r.group(1)
          time = r.group(2)
          name = r.group(3).lower()
          message = r.group(4).translate(str.maketrans('','',string.punctuation))

          return [date, time, name, message]
      return None