CancelledError derives from BaseException in Python >= 3.8. The significant functional

change here is in upload_to_reflector(). Unit tests in TestReflector were failing.
Deal with lint related to CancelledError cleanup.

lbry/dht/blob_announcer.py

@@ -42,8 +42,6 @@ class BlobAnnouncer:
                     log.debug("failed to announce %s, could only find %d peers, retrying soon.", blob_hash[:8], peers)
             except Exception as err:
                 self.announcements_sent_metric.labels(peers=0, error=True).inc()
-                if isinstance(err, asyncio.CancelledError):  # TODO: remove when updated to 3.8
-                    raise err
                 log.warning("error announcing %s: %s", blob_hash[:8], str(err))
 
     async def _announce(self, batch_size: typing.Optional[int] = 10):

lbry/extras/daemon/components.py

@@ -560,8 +560,6 @@ class UPnPComponent(Component):
                 self.upnp = await UPnP.discover(loop=self.component_manager.loop)
                 log.info("found upnp gateway: %s", self.upnp.gateway.manufacturer_string)
             except Exception as err:
-                if isinstance(err, asyncio.CancelledError):  # TODO: remove when updated to 3.8
-                    raise
                 log.warning("upnp discovery failed: %s", err)
                 self.upnp = None
 

lbry/file/file_manager.py

@@ -99,8 +99,6 @@ class FileManager:
             except asyncio.TimeoutError:
                 raise ResolveTimeoutError(uri)
             except Exception as err:
-                if isinstance(err, asyncio.CancelledError):
-                    raise
                 log.exception("Unexpected error resolving stream:")
                 raise ResolveError(f"Unexpected error resolving stream: {str(err)}")
             if 'error' in resolved_result:
@@ -249,7 +247,7 @@ class FileManager:
         except asyncio.TimeoutError:
             error = DownloadDataTimeoutError(stream.sd_hash)
             raise error
-        except Exception as err:  # forgive data timeout, don't delete stream
+        except (Exception, asyncio.CancelledError) as err:  # forgive data timeout, don't delete stream
             expected = (DownloadSDTimeoutError, DownloadDataTimeoutError, InsufficientFundsError,
                         KeyFeeAboveMaxAllowedError, ResolveError, InvalidStreamURLError)
             if isinstance(err, expected):

lbry/stream/managed_stream.py

@@ -367,7 +367,7 @@ class ManagedStream(ManagedDownloadSource):
             return sent
         except ConnectionError:
             return sent
-        except (OSError, Exception) as err:
+        except (OSError, Exception, asyncio.CancelledError) as err:
             if isinstance(err, asyncio.CancelledError):
                 log.warning("stopped uploading %s#%s to reflector", self.claim_name, self.claim_id)
             elif isinstance(err, OSError):

lbry/wallet/ledger.py

@@ -938,9 +938,7 @@ class Ledger(metaclass=LedgerRegistry):
                              "%d change addresses (gap: %d), %d channels, %d certificates and %d claims. ",
                              account.id, balance, total_receiving, account.receiving.gap, total_change,
                              account.change.gap, channel_count, len(account.channel_keys), claim_count)
-        except Exception as err:
+        except Exception:
-            if isinstance(err, asyncio.CancelledError):  # TODO: remove when updated to 3.8
-                raise
             log.exception(
                 'Failed to display wallet state, please file issue '
                 'for this bug along with the traceback you see below:')
@@ -963,9 +961,7 @@ class Ledger(metaclass=LedgerRegistry):
             claim_ids = [p.purchased_claim_id for p in purchases]
             try:
                 resolved, _, _, _ = await self.claim_search([], claim_ids=claim_ids)
-            except Exception as err:
+            except Exception:
-                if isinstance(err, asyncio.CancelledError):  # TODO: remove when updated to 3.8
-                    raise
                 log.exception("Resolve failed while looking up purchased claim ids:")
                 resolved = []
             lookup = {claim.claim_id: claim for claim in resolved}
@@ -1045,9 +1041,7 @@ class Ledger(metaclass=LedgerRegistry):
         claim_ids = collection.claim.collection.claims.ids[offset:page_size + offset]
         try:
             resolve_results, _, _, _ = await self.claim_search([], claim_ids=claim_ids)
-        except Exception as err:
+        except Exception:
-            if isinstance(err, asyncio.CancelledError):  # TODO: remove when updated to 3.8
-                raise
             log.exception("Resolve failed while looking up collection claim ids:")
             return []
         claims = []

lbry/wallet/network.py

@@ -117,7 +117,7 @@ class ClientSession(BaseClientSession):
                     )
                 else:
                     await asyncio.sleep(max(0, max_idle - (now - self.last_send)))
-        except Exception as err:
+        except (Exception, asyncio.CancelledError) as err:
             if isinstance(err, asyncio.CancelledError):
                 log.info("closing connection to %s:%i", *self.server)
             else:

lbry/wallet/orchstr8/node.py

@@ -264,7 +264,6 @@ class SPVNode:
             await self.server.start()
         except Exception as e:
             self.stopped = True
-            if not isinstance(e, asyncio.CancelledError):
             log.exception("failed to start spv node")
             raise e