tracing: fix types (#11871)

* tracing: fix types

* /profiler isn't a thing

* return list

tinygrad/helpers.py

@@ -196,7 +196,7 @@ class Profiling(contextlib.ContextDecorator):
 @dataclass(frozen=True)
 class TracingKey:
   display_name:str                       # display name of this trace event
-  keys:tuple[str, ...]=()                # optional keys to search for related traces
+  keys:tuple[Any, ...]=()                # optional keys to search for related traces
   cat:str|None=None                      # optional category to color this by
   ret:Any=None
 

tinygrad/viz/serve.py

@@ -258,7 +258,7 @@ class Handler(BaseHTTPRequestHandler):
       if url.path == "/disasm": ret, content_type = get_disassembly(**query), "application/json"
       else: return self.stream_json(get_details(contexts[1][int(query["ctx"][0])][int(query["idx"][0])]))
     elif url.path == "/ctxs": ret, content_type = json.dumps(ctxs).encode(), "application/json"
-    elif url.path == "/get_profile" and profile_ret is not None: ret, content_type = profile_ret, "application/octet-stream"
+    elif url.path == "/get_profile" and profile_ret: ret, content_type = profile_ret, "application/octet-stream"
     else: status_code = 404
 
     # send response
@@ -291,8 +291,8 @@ def reloader():
       os.execv(sys.executable, [sys.executable] + sys.argv)
     time.sleep(0.1)
 
-def load_pickle(path:str):
-  if path is None or not os.path.exists(path): return None
+def load_pickle(path:str|None) -> list:
+  if path is None or not os.path.exists(path): return []
   with open(path, "rb") as f: return pickle.load(f)
 
 # NOTE: using HTTPServer forces a potentially slow socket.getfqdn
@@ -315,16 +315,16 @@ if __name__ == "__main__":
   contexts, profile = load_pickle(args.kernels), load_pickle(args.profile)
 
   # NOTE: this context is a tuple of list[keys] and list[values]
-  ctxs = get_metadata(*contexts[:2]) if contexts is not None else []
+  ctxs = get_metadata(*contexts[:2]) if contexts else []
 
-  profile_ret = get_profile(profile) if profile is not None else None
+  profile_ret = get_profile(profile)
 
   server = TCPServerWithReuse(('', PORT), Handler)
   reloader_thread = threading.Thread(target=reloader)
   reloader_thread.start()
   print(f"*** started viz on {HOST}:{PORT}")
   print(colored(f"*** ready in {(time.perf_counter()-st)*1e3:4.2f}ms", "green"), flush=True)
-  if len(getenv("BROWSER", "")) > 0: webbrowser.open(f"{HOST}:{PORT}{'/profiler' if contexts is None else ''}")
+  if len(getenv("BROWSER", "")) > 0: webbrowser.open(f"{HOST}:{PORT}")
   try: server.serve_forever()
   except KeyboardInterrupt:
     print("*** viz is shutting down...")