parameters: (self)
return_statement: return self._serial.is_open is True
docstring: Check if connection is open.
  
          Returns: boolean
docstring_summary: Check if connection is open.
docstring_tokens: Check if connection is open .
function: async def is_open(self) -> bool:
          """
          Check if connection is open.
  
          Returns: boolean
          """
          return self._serial.is_open is True
function_tokens: async def is_open ( self ) -> bool : return self . _serial . is_open is True