How to include library in python and how to describe a variable as a particular data type

Question

In short can someone give me the general outline structure of program in python?....

Answer 1

to include a library, use the keyword 'import'. in python, there's no need to specify the data type of a variable because python uses dynamic binding. the same variable can be used for any data type you want it to be.
an example code

import sys

print(sys.argv) # prints the command line arguments
a=10
print(a) # prints 10
a="hello world"
print(a) # prints hello world