Remove system generated messages like "added", "removed", "left", "joined using this", "message was deleted"

remove_system_generated_msgs.py

def remove_system_generated_msgs(uploaded_file: str) -> list:
  """Remove system generated messages like::
      1. +234 was added
      2. +234 left etc

      uploaded_file: str: path of dataset

	   Returns:
     --------
     list
  """
  chats = pd.read_csv(uploaded_file, sep='\n', header=None, error_bad_lines=False,
      converters={h:str for h in header})[0].tolist()

  chat_msgs = []
  system_generated_msgs = ["added", "removed", "left", "joined using this", "message was deleted"]
  for chat in chats:
    if chat not in system_generated_msgs:
      chat_msgs.append(chat)

  return chat_msgs