chore(api): revert unnecessary changes to app.py

api/app.py

@@ -1,45 +1,4 @@
 import os
-
-
-def _setup_gevent():
-    """Do gevent monkey patching.
-
-    This function should be called as early as possible. Ideally
-    it should be the first statement in the entrypoint file.
-
-    It should be
-    """
-    _FALSE_VALUE_FOR_ENV = frozenset(["false", "0", "no"])
-    # It seems that JetBrains Python debugger does not work well with gevent,
-    # so we need to disable gevent in debug mode.
-    # If you are using debugpy and set GEVENT_SUPPORT=True, you can debug with gevent.
-    flask_debug_env = os.environ.get("FLASK_DEBUG", "0").lower()
-    if flask_debug_env not in _FALSE_VALUE_FOR_ENV:
-        print("Flask Debug enabled.", flush=True)
-        return
-    gevent_support_env = os.environ.get("GEVENT_SUPPORT", "false").lower()
-    if gevent_support_env in _FALSE_VALUE_FOR_ENV:
-        print("Gevent disabled.", flush=True)
-        return
-
-    from gevent import monkey
-
-    # gevent
-    monkey.patch_all()
-
-    from grpc.experimental import gevent as grpc_gevent  # type: ignore
-
-    # grpc gevent
-    grpc_gevent.init_gevent()
-
-    import psycogreen.gevent  # type: ignore
-
-    psycogreen.gevent.patch_psycopg()
-    print("Gevnet and psycopg patched", flush=True)
-
-
-_setup_gevent()
-
 import sys
 
 
@@ -55,6 +14,24 @@ if is_db_command():
 
     app = create_migrations_app()
 else:
+    # It seems that JetBrains Python debugger does not work well with gevent,
+    # so we need to disable gevent in debug mode.
+    # If you are using debugpy and set GEVENT_SUPPORT=True, you can debug with gevent.
+    if (flask_debug := os.environ.get("FLASK_DEBUG", "0")) and flask_debug.lower() in {"false", "0", "no"}:
+        from gevent import monkey
+
+        # gevent
+        monkey.patch_all()
+
+        from grpc.experimental import gevent as grpc_gevent  # type: ignore
+
+        # grpc gevent
+        grpc_gevent.init_gevent()
+
+        import psycogreen.gevent  # type: ignore
+
+        psycogreen.gevent.patch_psycopg()
+
     from app_factory import create_app
 
     app = create_app()