fix: wallet.is_used

gui/qt/main_window.py

@@ -1703,7 +1703,8 @@ class ElectrumWindow(QMainWindow):
                 used_flag = False
                 addr_list = account.get_addresses(is_change)
                 for address in addr_list:
-                    num, is_used = self.wallet.is_used(address)
+                    num = len(self.wallet.history.get(address,[]))
+                    is_used = self.wallet.is_used(address)
                     label = self.wallet.labels.get(address,'')
                     c, u, x = self.wallet.get_addr_balance(address)
                     balance = self.format_amount(c + u + x)

lib/wallet.py

@@ -1128,7 +1128,7 @@ class Abstract_Wallet(object):
     def is_used(self, address):
         h = self.history.get(address,[])
         c, u, x = self.get_addr_balance(address)
-        return len(h), len(h) > 0 and c + u + x == 0
+        return len(h) > 0 and c + u + x == 0
 
     def is_empty(self, address):
         c, u, x = self.get_addr_balance(address)
@@ -1346,8 +1346,7 @@ class Imported_Wallet(Abstract_Wallet):
         self.accounts[IMPORTED_ACCOUNT].get_private_key((0,0), self, password)
 
     def is_used(self, address):
-        h = self.history.get(address,[])
-        return len(h), False
+        return False
 
     def get_master_public_keys(self):
         return {}