Fix flake8 issues

labelme/app.py

@@ -309,7 +309,8 @@ class MainWindow(QtWidgets.QMainWindow, WindowMixin):
             zoomActions=zoomActions,
             fileMenuActions=(open, opendir, save, saveAs, close, quit),
             beginner=(), advanced=(),
-            editMenu=(edit, copy, delete, None, undoLastPoint, None, color1, color2),
+            editMenu=(edit, copy, delete, None, undoLastPoint,
+                      None, color1, color2),
             beginnerContext=(create, edit, copy, delete, undoLastPoint),
             advancedContext=(
                 createMode, editMode, edit, copy,
@@ -1057,7 +1058,7 @@ class MainWindow(QtWidgets.QMainWindow, WindowMixin):
             if self.noShapes():
                 for action in self.actions.onShapesPresent:
                     action.setEnabled(False)
-    
+
     def undoLastPoint(self):
         self.canvas.undoLastPoint()
 

labelme/canvas.py

@@ -538,7 +538,7 @@ class Canvas(QtWidgets.QWidget):
         self.current.setOpen()
         self.line.points = [self.current[-1], self.current[0]]
         self.drawingPolygon.emit(True)
-        
+
     def undoLastPoint(self):
         if self.current and not self.current.isClosed():
             self.current.popPoint()
@@ -547,7 +547,7 @@ class Canvas(QtWidgets.QWidget):
             else:
                 self.current = None
                 self.drawingPolygon.emit(False)
-            self.repaint()                
+            self.repaint()
 
     def loadPixmap(self, pixmap):
         self.pixmap = pixmap