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Important Notes To Remember : 
1. Python code is designed to be readable, and hence reusable and maintainable—much more so than traditional scripting languages. 
2. Python comes with a large collection of prebuilt and portable functionality, known as the standard library. 
3. Google makes extensive use of Python in its web search systems.
4. The popular YouTube video sharing service is largely written in Python.
5. The widespread BitTorrent peer-to-peer file sharing system began its life as a Python program.
6. Google’s App Engine web development framework uses Python as an application language.
7. Netflix and Yelp have both documented the role of Python in their software infrastructures.
8. Intel, Cisco, Hewlett-Packard, Seagate, Qualcomm, and IBM use Python for hardware testing.
9. JPMorgan Chase, UBS, Getco, and Citadel apply Python to financial market forecasting.
10. CPython is the standard implementation of the language.
11. Jython and IronPython implement Python programs for use in Java and .NET environments, respectively; they are alternative compilers for Python.

Interpreter :  
1. A software package called an interpreter. An interpreter is a kind of program that executes other programs.
2. When you write a Python program, the Python interpreter reads your program and carries out the instructions it contains.
3. When the Python package is installed on your machine, it generates a number of components—minimally, an interpreter and a support library.

Python Installation:  Learn from video lectures (Windows, Mac & Linux)

Byte code compilation:
when you execute a program Python first compiles your source code (the statements in your file) into a format known as byte code.
EX. a .pyc extension (“.pyc” means compiled “.py” source).
a.py >> a.pyc >> PVM
Source Code >> Byte Code >> RunTime