FILE HANDLING
=============
FILE ==> A PERMANENT STORAGE

TWO TYPES:
	1) TEXT FILES ==> .txt
	2) BINARY FILES ==> 
		image file (.jpg/.jpeg)
		audio file (.mp3/.mpeg)
		video file (.mp4)
		Pdf file
		Zip File etc.

Open a file:
============
open() ==> a built-in function	
	which can be used to open the file
Syntax:
	file-object/file-pointer = open("file-name-with-extension", "mode-of-file")

here:
	mode-of-file ==> reason to open the file
		writing/reading/both/appending etc.

ex: fp = open("abc.txt", "w")

File Modes:
===========
	w-mode
	r-mode
	a-mode
	w+-mode
	r+-mode
	a+-mode
	x-mode

Note:
=====
	above all modes for only "text files".

w-mode
======
	write-mode
	==> if the file-name (specified) is not available, "w-mode" can create the new-file with the specified name.
	==> if the file is already existed with some text/data:
		w-mode can delete all the data what we already have and open
	Because, by default the w-mode can always pointing to '0th' character.

r-mode:
=======
	read-mode
	==> read-mode can always allowed to open the existing files only.
	==> for the existing file, "r-mode" while open it will not flush the data.

a-mode:
=======
	append-mode
	==> read + append (after the old content, it can add)
	if the file is not existed ==> can create new
	if the file is existed ==> can open

w+-mode:
========
	write + read

r+-mode:
=======
	read + write

a+-mode:
========
	append + reading

x-mode:
=======
	==> same like w-mode
	==> x-mode can always open the new file only 
	existing files cannot open.