Finished Version 1.0. Guide for installation will be available soon

dev/hr.py

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+from kivy.lang import Builder
+
+from kivymd.app import MDApp
+
+KV = '''
+#:import KivyLexer kivy.extras.highlight.KivyLexer
+#:import HotReloadViewer kivymd.utils.hot_reload_viewer.HotReloadViewer
+
+
+BoxLayout:
+    HotReloadViewer:
+        size_hint_x: .3
+        path: app.path_to_kv_file
+        errors: True
+        errors_text_color: 1, 1, 0, 1
+        errors_background_color: app.theme_cls.bg_dark
+'''
+
+
+class Example(MDApp):
+    path_to_kv_file = "../gui/loading_screen.kv"
+
+    def build(self):
+        self.theme_cls.theme_style = "Dark"
+        return Builder.load_string(KV)
+
+    def update_kv_file(self, text):
+        with open(self.path_to_kv_file, "w") as kv_file:
+            kv_file.write(text)
+
+
+Example().run()