Update server.py

Author: Dreamsorcerer

frameworks/Python/aiohttp/app/server.py

@@ -1,9 +1,11 @@
+import multiprocessing
 import os
+import platform
 import socket
-import multiprocessing
+
 from aiohttp import web
+
 from .main import create_app
-import uvloop
 
 SERVERS_COUNT = multiprocessing.cpu_count()
 BACKLOG = 2048
@@ -12,7 +14,9 @@
 def start_server(sock, cpu_id):
     if hasattr(os, "sched_setaffinity"):
         os.sched_setaffinity(0, {cpu_id})
-    uvloop.install()
+    if platform.python_implementation() != "PyPy":
+        import uvloop
+        uvloop.install()
     app = create_app()
 
     web.run_app(app, sock=sock, backlog=BACKLOG, access_log=None)
@@ -43,4 +47,4 @@ def create_reusable_socket(host='0.0.0.0', port=8080):
         workers.append(worker)
 
     for worker in workers:
-        worker.join()
+        worker.join()