Resolve "Load/Save SFG to file"

Basic serializer for our datastructures to save and load to and from files. Uses a new package called dill that is based on pickle since pickle doesn't support serializing for lambda functions among other types.

Closes #66 (closed)

b_asic/utils.py

@@ -20,15 +20,18 @@ def save_structure(struct: AbstractOperation, _path: Optional[str] = None, _name
 
     Keyword Arguments:
     _path: The path (str) to which the structure will be saved.
-    _name: The name (str) of the file to be saved. Only used if _path is not defined and is not None.
+    _name: The name (str) of the file to be saved. Only used if _path is None.
     """
     try:
-        _name = _name if _name is not None else f"{struct.type_name}.pickle"
-
         if _path is None:
+            _name = _name if _name is not None else f"{struct.type_name}.pickle"
             _path = path.join(getcwd(), _name)
 
-        print(_path)
+            index = 1
+            while path.exists(_path):
+                _path = path.join(getcwd(), f"{struct.type_name}({index}).pickle")
+                index += 1
+
         with open(_path, "wb") as handle:
             dill.dump(struct, handle, protocol=dill.HIGHEST_PROTOCOL)
     except Exception as e: