move updater to own module

ModuleUpdate.py

@@ -0,0 +1,36 @@
+import sys
+import subprocess
+import importlib
+
+update_ran = False
+
+def update_command():
+    subprocess.call([sys.executable, '-m', 'pip', 'install', '-r', 'requirements.txt', '--upgrade'])
+
+def update():
+    global update_ran
+    if not update_ran:
+        update_ran = True
+        with open('requirements.txt') as requirementsfile:
+            for line in requirementsfile.readlines():
+                module, remoteversion = line.split(">=")
+                try:
+                    module = importlib.import_module(module)
+                except:
+                    import traceback
+                    traceback.print_exc()
+                    input(f'Required python module {module} not found, press enter to install it')
+                    update_command()
+                else:
+                    if hasattr(module, "__version__"):
+                        module_version = module.__version__
+                        module = module.__name__ #also unloads the module to make it writable
+                        if type(module_version) == str:
+                            module_version = tuple(int(part.strip()) for part in module_version.split("."))
+                        remoteversion = tuple(int(part.strip()) for part in remoteversion.split("."))
+                        if module_version < remoteversion:
+                            input(f'Required python module {module} is outdated ({module_version}<{remoteversion}), press enter to upgrade it')
+                            update_command()
+
+if __name__ == "__main__":
+    update()