upgrade pylint and fix lint errors

Makefile

@@ -4,8 +4,8 @@ install:
 	pip install -e .
 
 tools:
-	pip install mypy==0.701 pylint==2.4.4
+	pip install pylint==2.10.0
-	pip install coverage astroid pylint
+	pip install coverage
 
 lint:
 	pylint --rcfile=setup.cfg lbry

lbry/conf.py

@@ -203,7 +203,7 @@ class MaxKeyFee(Setting[dict]):
         )
         parser.add_argument(
             self.no_cli_name,
-            help=f"Disable maximum key fee check.",
+            help="Disable maximum key fee check.",
             dest=self.name,
             const=None,
             action="store_const",

lbry/dht/protocol/protocol.py

@@ -556,7 +556,7 @@ class KademliaProtocol(DatagramProtocol):
                     address[0], address[1], OLD_PROTOCOL_ERRORS[error_datagram.response]
                 )
 
-    def datagram_received(self, datagram: bytes, address: typing.Tuple[str, int]) -> None:  # pylint: disable=arguments-differ
+    def datagram_received(self, datagram: bytes, address: typing.Tuple[str, int]) -> None:  # pylint: disable=arguments-renamed
         try:
             message = decode_datagram(datagram)
         except (ValueError, TypeError, DecodeError):

lbry/dht/protocol/routing_table.py

@@ -50,7 +50,7 @@ class KBucket:
             self.peers.append(peer)
             return True
         else:
-            for i in range(len(self.peers)):
+            for i, _ in enumerate(self.peers):
                 local_peer = self.peers[i]
                 if local_peer.node_id == peer.node_id:
                     self.peers.remove(local_peer)

lbry/dht/serialization/datagram.py

@@ -181,7 +181,7 @@ def decode_datagram(datagram: bytes) -> typing.Union[RequestDatagram, ResponseDa
 def make_compact_ip(address: str) -> bytearray:
     compact_ip = reduce(lambda buff, x: buff + bytearray([int(x)]), address.split('.'), bytearray())
     if len(compact_ip) != 4:
-        raise ValueError(f"invalid IPv4 length")
+        raise ValueError("invalid IPv4 length")
     return compact_ip
 
 
@@ -190,7 +190,7 @@ def make_compact_address(node_id: bytes, address: str, port: int) -> bytearray:
     if not 0 < port < 65536:
         raise ValueError(f'Invalid port: {port}')
     if len(node_id) != constants.HASH_BITS // 8:
-        raise ValueError(f"invalid node node_id length")
+        raise ValueError("invalid node node_id length")
     return compact_ip + port.to_bytes(2, 'big') + node_id
 
 
@@ -201,5 +201,5 @@ def decode_compact_address(compact_address: bytes) -> typing.Tuple[bytes, str, i
     if not 0 < port < 65536:
         raise ValueError(f'Invalid port: {port}')
     if len(node_id) != constants.HASH_BITS // 8:
-        raise ValueError(f"invalid node node_id length")
+        raise ValueError("invalid node node_id length")
     return node_id, address, port

lbry/error/generate.py

@@ -63,7 +63,7 @@ class ErrorClass:
     @staticmethod
     def get_fields(args):
         if len(args) > 1:
-            return f''.join(f'\n{INDENT*2}self.{field} = {field}' for field in args[1:])
+            return ''.join(f'\n{INDENT*2}self.{field} = {field}' for field in args[1:])
         return ''
 
     @staticmethod

lbry/extras/cli.py

@@ -101,7 +101,7 @@ class ArgumentParser(argparse.ArgumentParser):
         self._optionals.title = 'Options'
         if group_name is None:
             self.epilog = (
-                f"Run 'lbrynet COMMAND --help' for more information on a command or group."
+                "Run 'lbrynet COMMAND --help' for more information on a command or group."
             )
         else:
             self.epilog = (

lbry/extras/daemon/daemon.py

@@ -1701,9 +1701,9 @@ class Daemon(metaclass=JSONRPCServerType):
                 'change': {'gap': change_gap, 'maximum_uses_per_address': change_max_uses},
                 'receiving': {'gap': receiving_gap, 'maximum_uses_per_address': receiving_max_uses},
             }
-            for chain_name in address_changes:
+            for chain_name, changes in address_changes.items():
                 chain = getattr(account, chain_name)
-                for attr, value in address_changes[chain_name].items():
+                for attr, value in changes.items():
                     if value is not None:
                         setattr(chain, attr, value)
                         change_made = True
@@ -2248,7 +2248,7 @@ class Daemon(metaclass=JSONRPCServerType):
                 raise Exception(f"Could not find claim with url '{url}'.")
         else:
             # TODO: use error from lbry.error
-            raise Exception(f"Missing argument claim_id or url. ")
+            raise Exception("Missing argument claim_id or url.")
         if not allow_duplicate_purchase and txo.purchase_receipt:
             # TODO: use error from lbry.error
             raise Exception(
@@ -4099,7 +4099,7 @@ class Daemon(metaclass=JSONRPCServerType):
                 raise Exception(f"Could not find collection with url '{url}'.")
         else:
             # TODO: use error from lbry.error
-            raise Exception(f"Missing argument claim_id or url. ")
+            raise Exception("Missing argument claim_id or url.")
 
         page_num, page_size = abs(page), min(abs(page_size), 50)
         items = await self.ledger.resolve_collection(txo, page_size * (page_num - 1), page_size)
@@ -5072,7 +5072,7 @@ class Daemon(metaclass=JSONRPCServerType):
             'buckets': {}
         }
 
-        for i in range(len(self.dht_node.protocol.routing_table.buckets)):
+        for i, _ in enumerate(self.dht_node.protocol.routing_table.buckets):
             result['buckets'][i] = []
             for peer in self.dht_node.protocol.routing_table.buckets[i].peers:
                 host = {

lbry/extras/daemon/json_response_encoder.py

@@ -123,7 +123,7 @@ class JSONResponseEncoder(JSONEncoder):
         self.ledger = ledger
         self.include_protobuf = include_protobuf
 
-    def default(self, obj):  # pylint: disable=method-hidden,arguments-differ,too-many-return-statements
+    def default(self, obj):  # pylint: disable=method-hidden,arguments-renamed,too-many-return-statements
         if isinstance(obj, Account):
             return self.encode_account(obj)
         if isinstance(obj, Wallet):

lbry/extras/daemon/storage.py

@@ -617,7 +617,7 @@ class SQLiteStorage(SQLiteMixin):
             ).fetchall()
             download_dir = binascii.hexlify(self.conf.download_dir.encode()).decode()
             transaction.executemany(
-                f"update file set download_directory=? where stream_hash=?",
+                "update file set download_directory=? where stream_hash=?",
                 ((download_dir, stream_hash) for stream_hash in stream_hashes)
             ).fetchall()
         await self.db.run_with_foreign_keys_disabled(_recover)
@@ -861,6 +861,6 @@ class SQLiteStorage(SQLiteMixin):
             transaction.execute('delete from peer').fetchall()
             transaction.executemany(
                 'insert into peer(node_id, address, udp_port, tcp_port) values (?, ?, ?, ?)',
-                tuple([(binascii.hexlify(p.node_id), p.address, p.udp_port, p.tcp_port) for p in peers])
+                ((binascii.hexlify(p.node_id), p.address, p.udp_port, p.tcp_port) for p in peers)
             ).fetchall()
         return await self.db.run(_save_kademlia_peers)

lbry/file_analysis.py

@@ -69,8 +69,8 @@ class VideoFileAnalyzer:
             version = str(e)
         if code != 0 or not version.startswith("ffmpeg"):
             log.warning("Unable to run ffmpeg, but it was requested. Code: %d; Message: %s", code, version)
-            raise FileNotFoundError(f"Unable to locate or run ffmpeg or ffprobe. Please install FFmpeg "
+            raise FileNotFoundError("Unable to locate or run ffmpeg or ffprobe. Please install FFmpeg "
-                                    f"and ensure that it is callable via PATH or conf.ffmpeg_path")
+                                    "and ensure that it is callable via PATH or conf.ffmpeg_path")
         log.debug("Using %s at %s", version.splitlines()[0].split(" Copyright")[0], self._which_ffmpeg)
         return version
 

lbry/stream/managed_stream.py

@@ -254,7 +254,7 @@ class ManagedStream(ManagedDownloadSource):
         self.finished_writing.clear()
         self.started_writing.clear()
         try:
-            open(output_path, 'wb').close()
+            open(output_path, 'wb').close()  # pylint: disable=consider-using-with
             async for blob_info, decrypted in self._aiter_read_stream(connection_id=self.SAVING_ID):
                 log.info("write blob %i/%i", blob_info.blob_num + 1, len(self.descriptor.blobs) - 1)
                 await self.loop.run_in_executor(None, self._write_decrypted_blob, output_path, decrypted)

lbry/utils.py

@@ -155,7 +155,7 @@ def async_timed_cache(duration: int):
         async def _inner(*args, **kwargs) -> typing.Any:
             loop = asyncio.get_running_loop()
             time_now = loop.time()
-            key = tuple([args, tuple([tuple([k, kwargs[k]]) for k in kwargs])])
+            key = (args, tuple(kwargs.items()))
             if key in cache and (time_now - cache[key][1] < duration):
                 return cache[key][0]
             to_cache = await func(*args, **kwargs)
@@ -173,7 +173,7 @@ def cache_concurrent(async_fn):
 
     @functools.wraps(async_fn)
     async def wrapper(*args, **kwargs):
-        key = tuple([args, tuple([tuple([k, kwargs[k]]) for k in kwargs])])
+        key = (args, tuple(kwargs.items()))
         cache[key] = cache.get(key) or asyncio.create_task(async_fn(*args, **kwargs))
         try:
             return await cache[key]
@@ -342,7 +342,7 @@ def lru_cache_concurrent(cache_size: typing.Optional[int] = None,
 
         @functools.wraps(async_fn)
         async def _inner(*args, **kwargs):
-            key = tuple([args, tuple([tuple([k, kwargs[k]]) for k in kwargs])])
+            key = (args, tuple(kwargs.items()))
             if key in lru_cache:
                 return lru_cache.get(key)
 

lbry/wallet/account.py

@@ -250,7 +250,7 @@ class Account:
         generator_name = address_generator.get('name', HierarchicalDeterministic.name)
         self.address_generator = self.address_generators[generator_name]
         self.receiving, self.change = self.address_generator.from_dict(self, address_generator)
-        self.address_managers = {am.chain_number: am for am in {self.receiving, self.change}}
+        self.address_managers = {am.chain_number: am for am in (self.receiving, self.change)}
         self.channel_keys = channel_keys
         ledger.add_account(self)
         wallet.add_account(self)

lbry/wallet/bip32.py

@@ -46,9 +46,11 @@ class _KeyBase:
         if len(raw_serkey) != 33:
             raise ValueError('raw_serkey must have length 33')
 
-        return (ver_bytes + bytes((self.depth,))
+        return (
+            ver_bytes + bytes((self.depth,))
             + self.parent_fingerprint() + self.n.to_bytes(4, 'big')
-                + self.chain_code + raw_serkey)
+            + self.chain_code + raw_serkey
+        )
 
     def identifier(self):
         raise NotImplementedError

lbry/wallet/database.py

@@ -82,10 +82,10 @@ class AIOSQLite:
         "read_count", "Number of database reads", namespace="daemon_database"
     )
     acquire_write_lock_metric = Histogram(
-        f'write_lock_acquired', 'Time to acquire the write lock', namespace="daemon_database", buckets=HISTOGRAM_BUCKETS
+        'write_lock_acquired', 'Time to acquire the write lock', namespace="daemon_database", buckets=HISTOGRAM_BUCKETS
     )
     held_write_lock_metric = Histogram(
-        f'write_lock_held', 'Length of time the write lock is held for', namespace="daemon_database",
+        'write_lock_held', 'Length of time the write lock is held for', namespace="daemon_database",
         buckets=HISTOGRAM_BUCKETS
     )
 
@@ -506,7 +506,7 @@ def _get_spendable_utxos(transaction: sqlite3.Connection, accounts: List, decode
                          amount_to_reserve: int, reserved_amount: int, floor: int, ceiling: int,
                          fee_per_byte: int) -> int:
     accounts_fmt = ",".join(["?"] * len(accounts))
-    txo_query = f"""
+    txo_query = """
         SELECT tx.txid, txo.txoid, tx.raw, tx.height, txo.position as nout, tx.is_verified, txo.amount FROM txo
         INNER JOIN account_address USING (address)
         LEFT JOIN txi USING (txoid)

setup.cfg

@@ -21,6 +21,7 @@ disable=
   c-extension-no-member,
   fixme,
   broad-except,
+  raise-missing-from,
   no-else-return,
   cyclic-import,
   missing-docstring,
@@ -37,5 +38,6 @@ disable=
   too-many-public-methods,
   too-many-return-statements,
   too-many-instance-attributes,
+  unspecified-encoding,
   protected-access,
   unused-argument