float -> int where needed

game-of-life.py

@@ -1,6 +1,6 @@
 import sys
 from PyQt5.QtWidgets import QApplication, QMainWindow
-from PyQt5.QtCore import Qt
+from PyQt5.QtCore import Qt, QSize
 import design
 from random import randint
 
@@ -13,7 +13,7 @@ def __init__(self, screen_width, screen_height, c1, c2):
         self.ui.setupUi(self)
 
         # resize the main window to a sensible value
-        self.resize(screen_width / 2, screen_height / 2)
+        self.resize(QSize(int(screen_width / 2), int(screen_height / 2)))
 
         # resize the graphics scene to match the window
         uv = self.ui.graphicsView

universeview.py

@@ -43,7 +43,7 @@ def seed(self, state):
         self.universe.seed(state)
 
     def start(self):
-        self._timer.start(constants.DefaultAtomicTick * 1000)
+        self._timer.start(int(constants.DefaultAtomicTick * 1000))
         self.frame_timestamps = []
         self.start_t = perf_counter()
 
@@ -189,7 +189,7 @@ def keyPressEvent(self, QKeyEvent):
             if self._timer.isActive():
                 self.stop()
             else:
-                self._timer.start(self._timerTickPeriod  * 1000)
+                self._timer.start(int(self._timerTickPeriod  * 1000))
 
         elif QKeyEvent.key() == Qt.Key_S:
             self._showStatus = not self._showStatus
@@ -211,11 +211,11 @@ def keyPressEvent(self, QKeyEvent):
 
         elif QKeyEvent.key() == Qt.Key_Minus:
             self._timerTickPeriod *= 1.05
-            self._timer.setInterval(self._timerTickPeriod * 1000)
+            self._timer.setInterval(int(self._timerTickPeriod * 1000))
 
         elif QKeyEvent.key() == Qt.Key_Plus:
             self._timerTickPeriod /= 1.05
-            self._timer.setInterval(self._timerTickPeriod * 1000)
+            self._timer.setInterval(int(self._timerTickPeriod * 1000))
 
         self.reDraw()
         QGraphicsView.keyPressEvent(self, QKeyEvent)