Cast environment variables to correct types

hivemind/utils/grpc.py

@@ -46,8 +46,8 @@ class ChannelCache(TimedStorage[ChannelInfo, Tuple[Union[grpc.Channel, grpc.aio.
     Unlike TimedStorage, ChannelCache actively evicts stale channels even if the cache is not accessed
     Unlike grpc._simple_stubs.ChannelCache, this implementation supports aio and does not forcibly close active channels
     """
-    MAXIMUM_CHANNELS = os.environ.get("GRPC_PYTHON_MANAGED_CHANNEL_MAXIMUM", 4096)
-    EVICTION_PERIOD_SECONDS = os.environ.get("GRPC_PYTHON_MANAGED_CHANNEL_EVICTION_SECONDS", 10 * 60)
+    MAXIMUM_CHANNELS = int(os.environ.get("GRPC_PYTHON_MANAGED_CHANNEL_MAXIMUM", 4096))
+    EVICTION_PERIOD_SECONDS = float(os.environ.get("GRPC_PYTHON_MANAGED_CHANNEL_EVICTION_SECONDS", 10 * 60))
     logger.debug(f"Eviction period = {EVICTION_PERIOD_SECONDS}s, max channels = {MAXIMUM_CHANNELS}")
 
     _singleton: Optional[ChannelCache] = None