python 3.10: fix some deprecation warnings and compat with 3.10

electrum/daemon.py

@@ -607,7 +607,7 @@ class Daemon(Logger):
             self._stopped_event.set()
 
     def run_gui(self, config, plugins):
-        threading.current_thread().setName('GUI')
+        threading.current_thread().name = 'GUI'
         gui_name = config.get('gui', 'qt')
         if gui_name in ['lite', 'classic']:
             gui_name = 'qt'

electrum/gui/qt/qrreader/qtmultimedia/camera_dialog.py

@@ -213,8 +213,8 @@ class QrReaderCameraDialog(Logger, MessageBoxMixin, QDialog):
         """
         Returns a QRect that is scan_size x scan_size in the middle of the resolution
         """
-        scan_pos_x = (resolution.width() - scan_size) / 2
-        scan_pos_y = (resolution.height() - scan_size) / 2
+        scan_pos_x = (resolution.width() - scan_size) // 2
+        scan_pos_y = (resolution.height() - scan_size) // 2
         return QRect(scan_pos_x, scan_pos_y, scan_size, scan_size)
 
     @staticmethod

electrum/gui/qt/qrreader/qtmultimedia/video_overlay.py

@@ -63,7 +63,7 @@ class QrReaderVideoOverlay(QWidget):
         self.bg_rect_pen = QPen()
         self.bg_rect_pen.setColor(Qt.black)
         self.bg_rect_pen.setStyle(Qt.DotLine)
-        self.bg_rect_fill = QColor(255, 255, 255, 255 * self.BG_RECT_OPACITY)
+        self.bg_rect_fill = QColor(255, 255, 255, int(255 * self.BG_RECT_OPACITY))
 
     def set_results(self, results: List[QrCodeResult], flip_x: bool,
                     validator_results: QrReaderValidatorResult):

electrum/gui/qt/qrreader/qtmultimedia/video_surface.py

@@ -60,7 +60,7 @@ class QrReaderVideoSurface(QAbstractVideoSurface):
             return False
 
         try:
-            img = QImage(frame.bits(), frame.width(), frame.height(), image_format)
+            img = QImage(int(frame.bits()), frame.width(), frame.height(), image_format)
 
             # Check whether we need to flip the image on any axis
             surface_format = self.surfaceFormat()

electrum/gui/qt/util.py

@@ -1175,8 +1175,8 @@ class FixedAspectRatioLayout(QLayout):
             c_aratio = 1
         s_aratio = self.aspect_ratio
         item_rect = QRect(QPoint(0, 0), QSize(
-            contents.width() if c_aratio < s_aratio else contents.height() * s_aratio,
-            contents.height() if c_aratio > s_aratio else contents.width() / s_aratio
+            contents.width() if c_aratio < s_aratio else int(contents.height() * s_aratio),
+            contents.height() if c_aratio > s_aratio else int(contents.width() / s_aratio)
         ))
 
         content_margins = self.contentsMargins()
@@ -1187,7 +1187,7 @@ class FixedAspectRatioLayout(QLayout):
                 if item.alignment() & Qt.AlignRight:
                     item_rect.moveRight(contents.width() + content_margins.right())
                 else:
-                    item_rect.moveLeft(content_margins.left() + (free_space.width() / 2))
+                    item_rect.moveLeft(content_margins.left() + (free_space.width() // 2))
             else:
                 item_rect.moveLeft(content_margins.left())
 
@@ -1195,7 +1195,7 @@ class FixedAspectRatioLayout(QLayout):
                 if item.alignment() & Qt.AlignBottom:
                     item_rect.moveBottom(contents.height() + content_margins.bottom())
                 else:
-                    item_rect.moveTop(content_margins.top() + (free_space.height() / 2))
+                    item_rect.moveTop(content_margins.top() + (free_space.height() // 2))
             else:
                 item_rect.moveTop(content_margins.top())
 
@@ -1224,10 +1224,10 @@ def QColorLerp(a: QColor, b: QColor, t: float):
     t = max(min(t, 1.0), 0.0)
     i_t = 1.0 - t
     return QColor(
-        (a.red()   * i_t) + (b.red()   * t),
-        (a.green() * i_t) + (b.green() * t),
-        (a.blue()  * i_t) + (b.blue()  * t),
-        (a.alpha() * i_t) + (b.alpha() * t),
+        int((a.red()   * i_t) + (b.red()   * t)),
+        int((a.green() * i_t) + (b.green() * t)),
+        int((a.blue()  * i_t) + (b.blue()  * t)),
+        int((a.alpha() * i_t) + (b.alpha() * t)),
     )
 
 

electrum/plugin.py

@@ -60,7 +60,7 @@ class Plugins(DaemonThread):
     @profiler
     def __init__(self, config: SimpleConfig, gui_name):
         DaemonThread.__init__(self)
-        self.setName('Plugins')
+        self.name = 'Plugins'  # set name of thread
         self.pkgpath = os.path.dirname(plugins.__file__)
         self.config = config
         self.hw_wallets = {}

electrum/sql_db.py

@@ -14,7 +14,7 @@ def sql(func):
     returns an awaitable asyncio.Future
     """
     def wrapper(self: 'SqlDB', *args, **kwargs):
-        assert threading.currentThread() != self.sql_thread
+        assert threading.current_thread() != self.sql_thread
         f = self.asyncio_loop.create_future()
         self.db_requests.put((f, func, args, kwargs))
         return f

electrum/util.py

@@ -340,7 +340,7 @@ class DaemonThread(threading.Thread, Logger):
     def __init__(self):
         threading.Thread.__init__(self)
         Logger.__init__(self)
-        self.parent_thread = threading.currentThread()
+        self.parent_thread = threading.current_thread()
         self.running = False
         self.running_lock = threading.Lock()
         self.job_lock = threading.Lock()
@@ -1317,7 +1317,7 @@ def create_and_start_event_loop() -> Tuple[asyncio.AbstractEventLoop,
     loop = asyncio.get_event_loop()
     loop.set_exception_handler(on_exception)
     # loop.set_debug(1)
-    stopping_fut = asyncio.Future()
+    stopping_fut = loop.create_future()
     loop_thread = threading.Thread(target=loop.run_until_complete,
                                          args=(stopping_fut,),
                                          name='EventLoop')

electrum/wallet_db.py

@@ -1393,7 +1393,7 @@ class WalletDB(JsonDB):
 
     @profiler
     def _write(self, storage: 'WalletStorage'):
-        if threading.currentThread().isDaemon():
+        if threading.current_thread().daemon:
             self.logger.warning('daemon thread cannot write db')
             return
         if not self.modified():