L-7 Modules in Python | Python for Data Science
Explained What is Module and how to create your own module? Also explained how to import Modules and how to use predefined Modules.
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Modules and Packages :
In Python, Modules are simply files with the “. py” extension containing Python code that can be imported inside another Python Program. In simple terms, we can consider a module to be the same as a code library or a file that contains a set of functions that you want to include in your application
Module initialization
The first time a module is loaded into a running Python script, it is initialized by executing the code in the module once. If another module in your code imports the same module again, it will not be loaded twice but once only - so local variables inside the module act as a "singleton" - they are initialized only once.
1) User-defined Modules
Create a Module
To create a module, create a Python file with a .py extension.
Call a Module
Modules created with a .py extension can be used in another Python source file, using the import statement.
2) Built-in Modules
There are several built-in modules in Python, which you can import whenever you like.
Call a built-in Module
To call a built-in Module and use the function of that module write:
import moduleName #call a module
moduleName.function()#use module function
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