Expose set_transaction_name (#4634)

Author: sl0thentr0py

sentry_sdk/__init__.py

@@ -49,6 +49,7 @@
     "logger",
     "start_session",
     "end_session",
+    "set_transaction_name",
 ]
 
 # Initialize the debug support after everything is loaded

sentry_sdk/api.py

@@ -84,6 +84,7 @@ def overload(x):
     "monitor",
     "start_session",
     "end_session",
+    "set_transaction_name",
 ]
 
 
@@ -466,3 +467,9 @@ def start_session(
 def end_session():
     # type: () -> None
     return get_isolation_scope().end_session()
+
+
+@scopemethod
+def set_transaction_name(name, source=None):
+    # type: (str, Optional[str]) -> None
+    return get_current_scope().set_transaction_name(name, source)