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Self_alter.py

@@ -0,0 +1,24 @@
+import lib_module
+
+def update():
+    import importlib
+    importlib.reload(lib_module)
+    del importlib
+def change_my_lib():
+    with open("lib_module.py", "w") as libby:
+        libby.write("def func_in_lib():\n\tprint('new logic!')\n")
+ 
+def reset_project_demo():
+   with open("lib_module.py", "w") as libby:
+        libby.write("def func_in_lib():\n\tprint('Old logic :(')\n")
+      
+if __name__ == '__main__':
+    lib_module.func_in_lib()
+    change_my_lib()
+    lib_module.func_in_lib()
+    # Notice the logic doesn't change till we update it. '
+    update()
+    lib_module.func_in_lib()
+    # Look, now we performed a hot reload of a library without turning off the program
+    # It should be obvious where this can be useful. 
+    reset_project_demo() 

lib_module.py

@@ -0,0 +1,3 @@
+def func_in_lib():
+    print("Old logic :( ")
+