Update service_request.py

service_request.py

@@ -64,7 +64,7 @@ def create_signature(api_secret: str) -> str:
 
 async def async_service_request(source_str: str, source: np.ndarray, target: np.ndarray, api_key: str, api_secret: str) -> np.ndarray:
 
-    if not target or len(target) == 0:
+    if target is None or len(target) == 0:
         return None
     
     ssl_context = ssl.create_default_context()
@@ -79,7 +79,7 @@ async def async_service_request(source_str: str, source: np.ndarray, target: np.
         }
         if source_str and len(source_str) > 0:
             request_dict["source_str"] = source_str
-        elif source and len(source) > 0:
+        elif source is not None and len(source) > 0:
             request_dict["source"] = base64.b64encode(source.tobytes()).decode("utf-8")
         else:
             return None