def call_command_handler(command, pymux, arguments):
assert isinstance(arguments, list)<EOL>command = ALIASES.get(command, command)<EOL>try:<EOL><INDENT>handler = COMMANDS_TO_HANDLERS[command]<EOL><DEDENT>except KeyError:<EOL><INDENT>pymux.show_message('<STR_LIT>' % (command,))<EOL><DEDENT>else:<EOL><INDENT>try:<EOL><INDENT>handler(pymux, arguments)<EOL><DEDENT>except CommandException as e:<EOL><INDENT>pymux.show_message(e.message)<EOL><DEDENT><DEDENT>
Execute command.

:param arguments: List of options.