Add warning for old python versions.

Main.py

@@ -34,7 +34,15 @@ class EnemizerError(RuntimeError):
     pass
 
 
+def check_python_version():
+    import sys
+    version = sys.version_info
+    if version.major < 3 or version.minor < 7:
+        logging.warning('Door Rando may have issues with python versions earlier than 3.7.  Detected version: %s', sys.version)
+
+
 def main(args, seed=None, fish=None):
+    check_python_version()
     if args.outputpath:
         os.makedirs(args.outputpath, exist_ok=True)
         output_path.cached_path = args.outputpath
@@ -257,11 +265,11 @@ def main(args, seed=None, fish=None):
                 rom = JsonRom() if args.jsonout or use_enemizer else LocalRom(args.rom)
 
                 if use_enemizer and (args.enemizercli or not args.jsonout):
-                    base_patch = LocalRom(args.rom)  # update base2current.json (side effect)
+                    local_rom = LocalRom(args.rom)  # update base2current.json (side effect)
                     if args.rom and not(os.path.isfile(args.rom)):
                         raise RuntimeError("Could not find valid base rom for enemizing at expected path %s." % args.rom)
                     if os.path.exists(args.enemizercli):
-                        patch_enemizer(world, player, rom, args.rom, args.enemizercli, sprite_random_on_hit)
+                        patch_enemizer(world, player, rom, local_rom, args.enemizercli, sprite_random_on_hit)
                         enemized = True
                         if not args.jsonout:
                             rom = LocalRom.fromJsonRom(rom, args.rom, 0x400000)