Have autoreload update shell namespace with reloaded module variables (3b1b#2278)

* Have autoreload update shell namespace with reloaded module variables

* Update comments

Author: 3b1b

docs/source/getting_started/configuration.rst

@@ -63,7 +63,7 @@ flag                                                       abbr   function
 ``--video_dir VIDEO_DIR``                                         Directory to write video
 ``--config_file CONFIG_FILE``                                     Path to the custom configuration file
 ``--log-level LOG_LEVEL``                                         Level of messages to Display, can be DEBUG / INFO / WARNING / ERROR / CRITICAL
-``--autoreload``                                                  Automatically reload Python modules to pick up code changes across different files
+``--autoreload``                                                  Automatically reload Python modules to pick up code changes across during an interactive embedding
 ========================================================== ====== =====================================================================================================================================================================================================
 
 custom_config

manimlib/scene/scene_embed.py

@@ -142,9 +142,12 @@ def reload_scene(self, embed_line: int | None = None) -> None:
         self.shell.run_line_magic("exit_raise", "")
 
     def auto_reload(self):
-        """Enables IPython autoreload for automatic reloading of modules."""
-        self.shell.magic("load_ext autoreload")
-        self.shell.magic("autoreload all")
+        """Enables reload the shell's module before all calls"""
+        def pre_cell_func(*args, **kwargs):
+            new_mod = ModuleLoader.get_module(self.shell.user_module.__file__, is_during_reload=True)
+            self.shell.user_ns.update(vars(new_mod))
+
+        self.shell.events.register("pre_run_cell", pre_cell_func)
 
     def checkpoint_paste(
         self,