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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _storeAccessContext(snmpEngine):
 """Copy received message metadata while it lasts"""

        execCtx = snmpEngine.observer.getExecutionContext('rfc3412.receiveMessage:request')

        return {
            'securityModel': execCtx['securityModel'],
            'securityName': execCtx['securityName'],
            'securityLevel': execCtx['securityLevel'],
            'contextName': execCtx['contextName'],
            'pduType': execCtx['pdu'].getTagSet()
        }