Modules and Packages¶

1. Creating Modules¶

a) import¶

Syntax:

import module1[, module2[,... moduleN]

Example:

Step 1:¶

Create module hello.py

def myprint_func( par ):
   print "Hello : ", par
   return

Step 2:¶

Now import this module hello.py in your test.py

#!/usr/bin/python3

# Import module hello
import hello

# Now you can call defined function that module as follows
hello.myprint_func("Saurabh")

Output:
Hello : Saurabh

b) The from…import Statement¶

Python’s from statement lets you import specific attributes from a module into the current namespace Syntax:

from modname import name1[, name2[, ... nameN]]

2. Creating Packages¶

Step 1:¶

Consider a file Apple.py available in Phone directory. This file has the following line of source code −

#!/usr/bin/python3

def Apple():
print ("I'm Apple Phone")

Step 2:¶

Similar, we have other two files having different functions with the same name as above. They are −

Phone/Nokia.py file having function Nokia()

Phone/Oppo.py file having function Oppo()

Step 3:¶

Now, create one more file __init__.py in the Phone directory −

Phone/__init__.py

Step 4:¶

To make all of your functions available when you have imported Phone, you need to put explicit import statements in __init__.py as follows −

from Apple import Apple
from Nokia import Nokia
from Oppo import Oppo

Step 5:¶

After you add these lines to __init__.py, you have all of these classes available when you import the Phone package.

#!/usr/bin/python3

# Now import your Phone Package.
import Phone

Phone.Apple()
Phone.Nokia()
Phone.Oppo()

Output:
I'm Apple Phone
I'm Oppo Phone
I'm Nokia Phone