Python: Add Memory tutorial port

examples/memory/Pipfile

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+# Copyright © SixtyFPS GmbH <info@slint.dev>
+# SPDX-License-Identifier: MIT
+
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+slint = { file = "../../api/python", editable = true }
+
+[dev-packages]
+
+[requires]
+python_version = "3"

examples/memory/main.py

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+# Copyright © SixtyFPS GmbH <info@slint.dev>
+# SPDX-License-Identifier: MIT
+
+# autopep8: off
+from datetime import timedelta, datetime
+import os
+import random
+import itertools
+import slint
+from slint import Color, ListModel, Timer, TimerMode
+import memory_slint
+# autopep8: on
+
+
+class MainWindow(memory_slint.MainWindow):
+    def __init__(self):
+        super().__init__()
+        initial_tiles = self.memory_tiles
+        tiles = ListModel(itertools.chain(initial_tiles, initial_tiles))
+        random.shuffle(tiles)
+        self.memory_tiles = tiles
+
+    @slint.callback
+    def check_if_pair_solved(self):
+        flipped_tiles = [(index, tile) for index, tile in enumerate(self.memory_tiles) if tile["image-visible"] and not tile["solved"]]
+        if len(flipped_tiles) == 2:
+            tile1_index, tile1 = flipped_tiles[0]
+            tile2_index, tile2 = flipped_tiles[1]
+            is_pair_solved = tile1["image"].path == tile2["image"].path
+            if is_pair_solved:
+                tile1["solved"] = True
+                self.memory_tiles[tile1_index] = tile1
+                tile2["solved"] = True
+                self.memory_tiles[tile2_index] = tile2
+            else:
+                self.disable_tiles = True
+
+                def reenable_tiles():
+                    self.disable_tiles = False
+                    tile1["image-visible"] = False
+                    self.memory_tiles[tile1_index] = tile1
+                    tile2["image-visible"] = False
+                    self.memory_tiles[tile2_index] = tile2
+
+                Timer.single_shot(timedelta(seconds=1), reenable_tiles)
+
+
+main_window = MainWindow()
+main_window.run()