Use list() around the call to map.keys()

Since in Python 3 it no longer returns a list, it returns a view
Pylons · Apr 25, 2022 · 729170f · 729170f
1 parent fb33aaa
commit 729170f
Showing 1 changed file with 4 additions and 3 deletions.
diff --git a/src/waitress/wasyncore.py b/src/waitress/wasyncore.py
@@ -151,7 +151,7 @@ def poll(timeout=0.0, map=None):
     if map is None:  # pragma: no cover
         map = socket_map
     if map:
-        fds = map.keys()
+        fds = list(map.keys())
 
         while True:
             r = []
@@ -179,8 +179,9 @@ def poll(timeout=0.0, map=None):
                 r, w, e = select.select(r, w, e, timeout)
             except OSError as err:
                 if err.args[0] == EBADF:  # pragma: no cover
-                    if fds != map.keys():
-                        fds = map.keys()
+                    _fds = list(map.keys())
+                    if fds != _fds:
+                        fds = _fds
                         continue
                 if err.args[0] != EINTR:
                     raise