diff --git a/lbry/wallet/ledger.py b/lbry/wallet/ledger.py
index 8b24565f6..f41ffb64c 100644
--- a/lbry/wallet/ledger.py
+++ b/lbry/wallet/ledger.py
@@ -3,7 +3,6 @@ import copy
 import time
 import asyncio
 import logging
-from io import StringIO
 from datetime import datetime
 from functools import partial
 from operator import itemgetter
@@ -490,7 +489,8 @@ class Ledger(metaclass=LedgerRegistry):
         address, remote_status = update
         self._update_tasks.add(self.update_history(address, remote_status))
 
-    async def update_history(self, address, remote_status, address_manager: AddressManager = None, reattempt_update: bool = True):
+    async def update_history(self, address, remote_status, address_manager: AddressManager = None,
+                             reattempt_update: bool = True):
         async with self._address_update_locks[address]:
             self._known_addresses_out_of_sync.discard(address)
             local_status, local_history = await self.get_local_status_and_history(address)
@@ -557,19 +557,23 @@ class Ledger(metaclass=LedgerRegistry):
                 #     continue
                 to_request[i] = (txid, remote_height)
 
-            log.debug("request %i transactions, %i/%i for %s are already synced", len(to_request), len(synced_txs), len(remote_history), address)
+            log.debug(
+                "request %i transactions, %i/%i for %s are already synced", len(to_request), len(synced_txs),
+                len(remote_history), address
+            )
             requested_txes = await self._request_transaction_batch(to_request, len(remote_history), address)
             for tx in requested_txes:
                 pending_synced_history[tx_indexes[tx.id]] = f"{tx.id}:{tx.height}:"
                 synced_txs.append(tx)
 
-            assert len(pending_synced_history) == len(remote_history), f"{len(pending_synced_history)} vs {len(remote_history)}\n{remote_history}\n{pending_synced_history}"
+            assert len(pending_synced_history) == len(remote_history), \
+                f"{len(pending_synced_history)} vs {len(remote_history)}"
             synced_history = ""
             for remote_i, i in zip(range(len(remote_history)), sorted(pending_synced_history.keys())):
                 assert i == remote_i, f"{i} vs {remote_i}"
                 txid, height = remote_history[remote_i]
                 if f"{txid}:{height}:" != pending_synced_history[i]:
-                    log.warning("history mismatch: %s:%i: vs %s", remote_history[remote_i], pending_synced_history[i])
+                    log.warning("history mismatch: %s vs %s", remote_history[remote_i], pending_synced_history[i])
                 synced_history += pending_synced_history[i]
 
             cache_size = self.config.get("tx_cache_size", 100_000)
@@ -582,7 +586,6 @@ class Ledger(metaclass=LedgerRegistry):
                     cache_item.lock.release()
                 except RuntimeError:
                     log.warning("lock was already released?")
-                    pass
 
             await self.db.save_transaction_io_batch(
                 [], address, self.address_to_hash160(address), synced_history
@@ -724,7 +727,7 @@ class Ledger(metaclass=LedgerRegistry):
                     try:
                         header = header_cache.get(remote_heights[txid]) or (await self.headers.get(merkle_height))
                     except IndexError:
-                        log.warning("failed to verify %s at height %i",  tx.id, merkle_height)
+                        log.warning("failed to verify %s at height %i", tx.id, merkle_height)
                     else:
                         header_cache[remote_heights[txid]] = header
                         tx.position = merkle['pos']