Modules allow us to store definitions of different functions and classes in a Python file, and then such files can be used in other files. The
matplotlib are some of the most widely used modules in Python.
We can also create our own modules in Python, which can increase modularity and simplify large programs.
Unimport a Module in Python
We use the
import command to load a specific module to memory in Python. We cannot unimport a module since Python stores it in the cache memory, but we can use a few commands and try to dereference these modules so that we are unable to access it during the program. These methods, however, might fail at times, so please be careful.
The first is the
del command. It is used to remove a variety of objects in Python. Removing the access of a module using this command is shown below.
import module_name del module_name
sys.modules is a dictionary that can be viewed using the
sys module and is used to store the references of a function and modules. We can remove the required module from this dictionary using the
del command to remove its every reference. It is difficult to remove modules that have been referenced a lot, so one needs to be careful while using this. This method might produce unwanted results, so please be cautious.
if 'myModule' in sys.modules: del sys.modules["myModule"]
Reload a Module in Python
In case we have made changes to a module and wish to implement those changes without restarting the program, we can use the
reload() function that will reload the required module.
reload() function has a long history in Python. Till Python 2.7 it was a built-in function.
In Python 3.0 to Python 3.3, it was present in the
imp library that was later deprecated and changed to
importlib module, which contains functions for implementing the mechanisms of importing codes in files Python.
The following code shows how to use the
import importlib reload(module_name)