Update pyevmasm/evmasm.py

Co-Authored-By: Disconnect3d <dominik.b.czarnota@gmail.com>

Author: feliam

pyevmasm/evmasm.py

@@ -270,7 +270,7 @@ def writes_to_stack(self):
     @property
     def writes_to_memory(self):
         """ True if the instruction writes to memory """
-        return self.semantics in ('MSTORE', 'MSTORE8', 'CALLDATACOPY', 'CODECOPY', 'EXTCODECOPY', 'RETURNDATACOPY', 'CALL', 'STATICCALL', 'DELEGATECALL', 'CALLCODE')
+        return self.semantics in {'MSTORE', 'MSTORE8', 'CALLDATACOPY', 'CODECOPY', 'EXTCODECOPY', 'RETURNDATACOPY', 'CALL', 'STATICCALL', 'DELEGATECALL', 'CALLCODE'}
 
     @property
     def reads_from_memory(self):