Reload or unimport modules in Python
Modules allow us to store definitions of different functions and classes in Python files, which can then be used in other files. pandas, NumPy, scipy, Matplotlibare the most widely used modules in Python.
We can also create our own modules in Python, which can increase modularity and simplify large programs.
Unimporting modules in Python
We use importthe command to load a specific module into Python's memory. We cannot un-import a module because Python stores it in the cache, but we can use some commands and try to dereference these modules so that we cannot access it in our program. However, these methods may fail sometimes, so be careful.
The first one is delthe command. It is used to delete various objects in Python. Below shows the use of this command to remove the access to a module.
import module_name
del module_name
sys.modulesis a dictionary that can be sysviewed with the module, which is used to store references to a function and module. We can delremove the desired module from this dictionary using the command, deleting every reference to it. It is difficult to remove modules that have a large number of references, so you need to be careful when using it. This method may produce unwanted results, so please be cautious.
if "myModule" in sys.modules:
del sys.modules["myModule"]
Reloading a module in Python
If we make changes to a module and want to implement those changes without restarting the program, we can use reload()the reload function to reload the required module.
reload()Functions have a long history in Python. Until Python 2.7, it was a built-in function.
In Python 3.0 to Python 3.3, it existed in impthe library, which was later deprecated in favor of importlibthe module, which contained functions that implemented the import mechanism for code in Python files.
The following code shows how to use reload()the function.
import importlib
reload(module_name)
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