Introduction and use of Python modules

Format:
1) Import Module
2) from ModName import name
3) Package "directory" contains multiple *.py files, write __init__.py file in package, write to import statement
Lg:from Pots Import Pots
sys//variables and functions associated with the Python interpreter
OS//provides the ability to access multiple operating system services
fileinput//traversing all lines of a text file
collection [Set], heap [HEAPD], and double-ended queue [collections]
time//gets the current time and can be manipulated and formatted in time and date
random//functions that return random numbers
shelve//Create persistent mappings and save the mapped content in a database of the given file name
re//Regular Expressions

Introduction and use of Python modules