<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _del_process(self, dwProcessId):
 """ Private method to remove a process object from the snapshot. @type dwProcessId: int @param dwProcessId: Global process ID. """

        try:
            aProcess = self.__processDict[dwProcessId]
            del self.__processDict[dwProcessId]
        except KeyError:
            aProcess = None
            msg = "Unknown process ID %d" % dwProcessId
            warnings.warn(msg, RuntimeWarning)
        if aProcess:
            aProcess.clear()