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Python is an interpreted, object-oriented, high-level programming language.

Python is a case-sensitive by Nature.

Python Software Foundation is an organization which is behind the Python.

Python used  most in

  • Web development.
  • Desktop GUIs.
  • AI and machine learning.
  • Data Science.
  • Game Development.

Python Features

1. Python allows you to assign values to multiple variables in one line

Example: x, y, z = "Orange", "Banana", "Cherry"

Python Interpreter

Interpreter reads Python programs and convert into machine instructions;

Python installer bundled with  python interpreter and IDE .

install the Python interpreter on your computer.

 

Python Launcher

The Python launcher is a feature which track all Python version installed in machine  and  handle to execute program of different Python versions.

 

how to check Python launcher installed or not

From the command-line  type 

C:\Users\manoj>py
Python 3.10.1 (tags/v3.10.1:2cd268a, Dec 6 2021, 19:10:37) [MSC v.1929 64 bit (AMD64)] on win32 Type "help", "copyright", "credits" or "license" for more information. >>>

 

You should find that the latest version of Python you have installed

If multiple versions of Python installed try with specific version

C:\Users\manoj>py -2.7
Requested Python version (2.9) is not installed

If you see the following error, you do not have the launcher installed:

'py' is not recognized as an internal or external command, operable program or batch file.

key benefit: a single launcher can support multiple Python versions at the same time.

how to check pip installed or not

From the command-line  type 

C:\Users\manoj>pip --verion
C:\Users\manoj>pip --version pip 21.2.4 from C:\Users\manoj\AppData\Local\Programs\Python\Python310\lib\site-packages\pip (python 3.10)

IPython: Interactive Python