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Modulus

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What is a Module?

Consider a module to be the same as a code library.

A file containing a set of functions you want to include in your application.

Create a Module

To create a module just save the code you want in a file with the file extension: .py

Example

Save this code in a file named mymodule.py

def greeting(name):
  print("Hello, " + name)

Use a Module
Now we can use the module we just created, by using the import statement:
Example
Import the module named mymodule, and call the greeting function:
demo_module1.py:

import mymodule
mymodule.greeting("Jonathan")
Output:-
C:\Users\My Name>python demo_module1.py
Hello, Jonathan
Note: When using a function from a module, use the syntax: module_name.
Variables in Module
The module can contain functions, as already described, but also variables of all types (arrays, dictionaries, objects etc):
Save this code in the file mymodule.py
person1 = {
  "name": "John",
  "age": 36,
  "country": "Norway"
}
Example
Import the module named mymodule, and access the person1 dictionary:
demo_module2.py:
import mymodule
a = mymodule.person1["age"]
print(a)


Output-
C:\Users\My Name>python demo_module2.py
36

Naming a Module
You can name the module file whatever you like, but it must have the file extension .py
Re-naming a Module
You can create an alias when you import a module, by using the as keyword:
Example
Create an alias for mymodule called mx:

 demo_module3.py:
import mymodule as mx
a = mx.person1["age"]
print(a)

Output-
C:\Users\My Name>python demo_module3.py
36


Built-in Modules
There are several built-in modules in Python, which you can import whenever you like.
Example
Import and use the platform module:
import platform

x = platform.system()
print(x)  
Output-

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Modulus

What is a Module?

Create a Module

Example

Use a Module

Example

Output:-

C:\Users\My Name>python demo_module1.py
Hello, Jonathan

Note: When using a function from a module, use the syntax: module_name.

Variables in Module

Example

Output-

C:\Users\My Name>python demo_module2.py
36

Naming a Module

You can name the module file whatever you like, but it must have the file extension `.py`

Re-naming a Module

You can create an alias when you import a module, by using the `as` keyword:

Example

Create an alias for `mymodule` called `mx`:

Built-in Modules

Example

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Modulus

What is a Module?

Create a Module

Example

Use a Module

Example

Output:-

C:\Users\My Name>python demo_module1.pyHello, Jonathan

Note: When using a function from a module, use the syntax: module_name.

Variables in Module

Example

Output-

C:\Users\My Name>python demo_module2.py36

Naming a Module

You can name the module file whatever you like, but it must have the file extension .py

Re-naming a Module

You can create an alias when you import a module, by using the as keyword:

Example

Create an alias for mymodule called mx:

Built-in Modules

Example

Do you Know?

Facilities

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C:\Users\My Name>python demo_module1.py
Hello, Jonathan

C:\Users\My Name>python demo_module2.py
36

You can name the module file whatever you like, but it must have the file extension `.py`

You can create an alias when you import a module, by using the `as` keyword:

Create an alias for `mymodule` called `mx`: