text: import logging
  
  from telegram import ParseMode
  from telegram.ext import CommandHandler
  
  from . import rollem
  
  commands = ["roll"]
  logger = logging.getLogger(__package__)
  
  
  def register(dp):
      dp.add_handler(CommandHandler(commands, roll))
      logger.info(f"Registered for commands {commands}")
  
  
  def roll(update, context):
      user = update.message.from_user.name
  
      if not context.args:
          request = ""
      else:
          request = context.args[0]
  
      parsed_request = interpret(request)
  
      try:
          result = rollem.roll(parsed_request)
          formula = result["visual"]
          total = result["total"]
  
          msg = f"{user} rolled {request}:\n{formula}\n= <strong>{total}</strong>"
          update.message.reply_text(msg, parse_mode=ParseMode.HTML)
  
      except rollem.InvalidFormatEquationException:
          logger.error("Invalid format: " + request)
          update.message.reply_text("Invalid format")
  
  
  def interpret(request):
      if not request:
          return "4dF"
      else:
          return request
  