Change methods not using its bound instance to staticmethods (#12)

Author: deepsource-autofix[bot]

src/Action.py

@@ -2,6 +2,7 @@ class Action:
     def __init__(self, expression :str):
         self.expression = expression
 
-    def to_string(self):
+    @staticmethod
+    def to_string():
         result_s = ""
         return result_s

src/Actions.py

@@ -2,6 +2,7 @@ class Actions:
     def __init__(self, actions = []):
         self.actions = actions
 
-    def to_string(self):
+    @staticmethod
+    def to_string():
         result_s = ""
         return result_s

src/Condition.py

@@ -3,6 +3,7 @@ def __init__(self, expression :str, result : str ):
         self.expression = expression
         self.result = result
 
-    def to_string(self):
+    @staticmethod
+    def to_string():
         result_s = ""
         return result_s

src/Conditions.py

@@ -2,6 +2,7 @@ class Conditions:
     def __init__(self, conditions = [] ):
         self.conditions = conditions
 
-    def to_string(self):
+    @staticmethod
+    def to_string():
         result_s = ""
         return result_s

src/StateMachine.py

@@ -71,7 +71,8 @@ def __RestoreState(self):
         self.current_state = self.saved_state[0]
         self.context = self.saved_state[1]
 
-    def __PrepareExpression(self,expression):
+    @staticmethod
+    def __PrepareExpression(expression):
         module_expression=expression.rsplit('.',1)
         return module_expression[0],module_expression[1]