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

api/app.py

@@ -1,27 +1,23 @@
 import os
+import sys
 
 
-def _setup_gevent():
-    """Do gevent monkey patching.
+def is_db_command():
+    if len(sys.argv) > 1 and sys.argv[0].endswith("flask") and sys.argv[1] == "db":
+        return True
+    return False
 
-    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"])
+# create app
+if is_db_command():
+    from app_factory import create_migrations_app
+
+    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.
-    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
-
+    if (flask_debug := os.environ.get("FLASK_DEBUG", "0")) and flask_debug.lower() in {"false", "0", "no"}:
         from gevent import monkey
 
         # gevent
@@ -35,26 +31,7 @@ def _setup_gevent():
         import psycogreen.gevent  # type: ignore
 
         psycogreen.gevent.patch_psycopg()
-    print("Gevnet and psycopg patched", flush=True)
 
-
-_setup_gevent()
-
-import sys
-
-
-def is_db_command():
-    if len(sys.argv) > 1 and sys.argv[0].endswith("flask") and sys.argv[1] == "db":
-        return True
-    return False
-
-
-# create app
-if is_db_command():
-    from app_factory import create_migrations_app
-
-    app = create_migrations_app()
-else:
     from app_factory import create_app
 
     app = create_app()