fixed index out of range error

Closes #7 (closed)

src/simudator/core/modules/memory.py

@@ -23,10 +23,10 @@ class Memory(Module):
 
         # signals
         signals = {
-                "in_input": input_signal,
-                "in_control": control_signal,
-                "in_address": address_signal,
-                "out_content": output_signal
+            "in_input": input_signal,
+            "in_control": control_signal,
+            "in_address": address_signal,
+            "out_content": output_signal,
         }
 
         # Init super class
@@ -54,11 +54,7 @@ class Memory(Module):
         adr_sig = self.signals["in_address"]
         ctrl_sig = self.signals["in_control"]
         out_sig = self.signals["out_content"]
-        if (
-
-            adr_sig.get_value() is not None
-            and ctrl_sig.get_value() is not None
-        ):
+        if adr_sig.get_value() is not None and ctrl_sig.get_value() is not None:
             self.is_write = ctrl_sig.get_value()
             self.current_address = adr_sig.get_value()
             out_sig.update_value(self.memory[self.current_address])
@@ -98,12 +94,15 @@ class Memory(Module):
         for i in range(len(self.memory)):
             self.memory[i] = 0
 
-    def get_longest_line_len(self, ignore_keys=[]) -> int:
+    def get_longest_line_len(self, ignore_keys=None) -> int:
         """
         Helper function for pretty_print that returns the length of
         the longest value in the memory to print for a module.
         """
 
+        if ignore_keys is None:
+            ignore_keys = []
+
         longest_memory_line = 0
 
         for value in self.memory: