Port 'Grid' demo to Python

demos/Grid/main.py

@@ -0,0 +1,49 @@
+import workbench
+from random import randint
+
+button_ids = [
+    "button00",
+    "button01",
+    "button02",
+    "button10",
+    "button11",
+    "button12",
+    "button20",
+    "button21",
+    "button22",
+]
+
+
+def on_clicked(button):
+    global step
+    # check access for user action
+    image = button.get_child()
+    if image.get_icon_name():
+        return
+    # store and show user action
+    image.set_from_icon_name("cross-large-symbolic")
+    # calculate pc reaction
+    pc_is_thinking = True
+    while pc_is_thinking:
+        pc_is_thinking_row = str(randint(0, 2))
+        pc_is_thinking_col = str(randint(0, 2))
+        # make pc reaction if possible
+        temp = workbench.builder.get_object(
+            f"button{pc_is_thinking_row}{pc_is_thinking_col}"
+        )
+        temp_image = temp.get_child()
+        if not temp_image.get_icon_name():
+            # store and show pc reaction
+            temp_image.set_from_icon_name("circle-outline-thick-symbolic")
+            pc_is_thinking = False
+            step += 2
+
+        if step >= 8:
+            pc_is_thinking = False
+
+
+for id in button_ids:
+    button = workbench.builder.get_object(id)
+    button.connect("clicked", on_clicked)
+
+step = 1