client init set default client if not exist

Author: JqRrt

cozeloop/_client.py

@@ -221,6 +221,12 @@ def combined_processor(event_info: FinishEventInfo):
             prompt_trace=prompt_trace
         )
 
+        temp_cli = None
+        with _client_lock:
+            temp_cli = _default_client
+        if temp_cli is None:
+            set_default_client(self)
+
     def _create_default_header_injector(self) -> Callable[[], Dict[str, str]]:
         def default_header_injector() -> Dict[str, str]:
             try:

examples/trace/simple.py

@@ -5,6 +5,8 @@
 import os
 import time
 
+import cozeloop
+
 from cozeloop import new_client
 from cozeloop.logger import set_log_level
 
@@ -105,7 +107,7 @@ def do_simple_demo():
     # Warning! In general, this method is not needed to be call, as spans will be automatically reported in batches.
     # Note that flush will block and wait for the report to complete, and it may cause frequent reporting,
     # affecting performance.
-    client.flush()
+    cozeloop.flush()
 
     # -- close trace, do flush and close client
     # Warning! Once Close is executed, the client will become unavailable and a new client needs