How to use Python modules in programs ?

IMPORTING MODULE
from <pkg> import <module>

# Using module under package
from openpyxl import workbook

# Direct module usage
import calendar



PRINTING MODULES OF A PACKAGE
# Prints all modules + sys vars of package openpyxl
import openpyxl
print(dir(openpyxl)) 

import calendar
print(dir(calendar))

# Prints all functions available in String
name="Orange"
print(dir(name))
 
# Prints all functions available in integer
val=50
print(dir(val))