State cleanup

mythril/laser/ethereum/state.py

@@ -143,7 +143,7 @@ class GlobalState:
     """
     GlobalState represents the current globalstate
     """
-    def __init__(self, world_state, environment, node, machine_state=None, transaction_stack=None, ret_data=None):
+    def __init__(self, world_state, environment, node, machine_state=None, transaction_stack=None, last_return_data=None):
         """ Constructor for GlobalState"""
         self.node = node
         self.world_state = world_state
@@ -151,20 +151,21 @@ class GlobalState:
         self.mstate = machine_state if machine_state else MachineState(gas=10000000)
         self.transaction_stack = transaction_stack if transaction_stack else []
         self.op_code = ""
-        self.last_return_data = ret_data
+        self.last_return_data = last_return_data
 
     def __copy__(self):
         world_state = copy(self.world_state)
         environment = copy(self.environment)
         mstate = deepcopy(self.mstate)
         transaction_stack = copy(self.transaction_stack)
-        return GlobalState(world_state, environment, self.node, mstate, transaction_stack=transaction_stack, ret_data=self.last_return_data)
+        return GlobalState(world_state, environment, self.node, mstate, transaction_stack=transaction_stack,
+                           last_return_data=self.last_return_data)
 
     @property
     def accounts(self):
         return self.world_state.accounts
 
-    #TODO: remove this, as two instructions are confusing
+    # TODO: remove this, as two instructions are confusing
     def get_current_instruction(self):
         """ Gets the current instruction for this GlobalState"""
         instructions = self.environment.code.instruction_list
@@ -177,6 +178,7 @@ class GlobalState:
         except IndexError:
             return None
 
+
 class WorldState:
     """
     The WorldState class represents the world state as described in the yellow paper