Modules and Packages

• A module is a file of any python code. We need not do any thing special, Every python file is considered as module (name with .py)
• Refer Here for the sample usage of the python module
• Now when we write python code in .py files there are two usage
  • directly execute the python code python modulename.py
  • importing the python code into other modules

  import <module>
  

• Refer Here for the implementation __name__ to differentiate module execution vs import
• Refer Here for importing module using from
• Importing a module with other name

import options as o
from numbers import factors

hotel = o.pick_a_hotel()
print(f"Lets go to {hotel}")
print(factors(8))

• Imported options module as o and called the pick_a_hotel method

Exercise

• Create a new directory ‘numerical’ and Create following python modules

  • query: In this module create functions
    • is_prime
    • is_even
  • operations: In this module implement the following functions
    • factors
    • factorial
  • monetary: In this module implement the following functions
    • simple_interest
    • compound_interest

• Refer Here for the implementation

Module Search Path

• Python looks under current directory for resolving modules

>>> import sys
>>> for place in sys.path:
...     print(place)

• The initial empty string represents the current directory ![Preview]https://directdevops.blog/wp-content/uploads/2021/06/py11.png)

Terms

• Module
• Package