FILE HANDLING PART-02:
======================
HOW TO WRITE THE DATA INTO FILE?
================================
==> two functions:
	1) write()
	2) writelines()

1) write():
===========
to write something into file,
	we should open the file with:
		w-mode/w+-mode/r+-mode/a-mode/a+-mode/x-mode
Syntax:
	file-object.write(data)

# write() function can write data in the same line in a file.

fp = open("abc1.txt","w")
# ld = ["Python","is","High-level","Programming","Language"]

# writing the data into abc1.txt file

fp.write("Hi\n")
fp.write("Good Evening\n")
fp.write("We are from Ashok IT.\n")
fp.write("Ashok IT is located in Hyderabad.\n")

# fp.write(ld)
===========================================
writelines():
=============
Syntax:
	file-object.writelines(list of string content)

fp = open("abc2.txt","a")
ld = ["Python is \n","Excellent Language\n","To Learn Easily\n"]

fp.writelines("Hi\n")
fp.writelines("Welcome To Ashok IT.\n")
fp.writelines("We are from Hyderabad.\n")

fp.writelines(ld)
===================================================
Inline functions and block functions:
=====================================
Inline functions ==> can always do the task within the same line (side by side in a line)
Ex: write(), writelines()

block functions ==> can always take the new line with every definition
Ex: print()
==============================================
How to read the data from text files?
=====================================
==> to read data from files:
	we should open the file in:
		r-mode/r+-mode/w+-mode

==> four different ways:
	1) read()
	2) read(n)
	3) readline()
	4) readlines()

# reading the data:
# read() ==> can read whole data from file character by character.
# read(n) ==> can help to read the data upto n-number of characters
# readline() ==> can read the data of only one line at a time.
# readlines() ==> can read all the lines of the content/data from the file

fp = open("abc1.txt","r")

# fileData = fp.read()
# fileData1 = fp.read(15) # want to read upto 15-characters

# print(fileData)
# print()
# print(fileData1)
# d1 = fp.readline()
# d2 = fp.readline()
# d3 = fp.readline()
# d4 = fp.readline()
#
# print(d1)
# print(d2)
# print(d3)
# print(d4)

linesOfData = fp.readlines()

for i in linesOfData:
    print(i)
===================================
with statement:
===============
==> can help to define block of file actions.
==> with ===> keyword

# with statement

with open("abc3.txt","w") as fp:
    fp.write("Python\n")
    fp.write("Java\n")
    fp.write("JavaScript\n")
    fp.write("Node JS\n")
    print("The File Name = ",fp.name)
    print("Mode of the file = ",fp.mode)
    print("Allowed for writing? = ",fp.writable())
    print("Allowed for reading? = ",fp.readable())
    print("Is file closed? = ",fp.closed)

print("Is file closed? = ",fp.closed)
=======================================================
tell():
======
==> a built-in function
can return the current position of the file pointer.

Ex: "abc.txt"
	Hi
	Hello
	Good Evening
	This is our File Handling Concept.

tell() ==> 0
read(10)
tell() ==> 11
read(20)
tell() ==> 32

Syntax:
	file-pointer/file-object.tell()

fp = open("abc1.txt","r")

print("The Current Position of the fp = ",fp.tell())

fp.read(5)
print("The Current Position of the fp = ",fp.tell())

fp.read(15)
print("The Current Position of the fp = ",fp.tell())

=============================================
seek():
=======

abc.txt
	Hi
	Hello
	Welcome To Ashok IT.

tell() ==> 0
==> seek() is a built-in function can use to move the file pointer from one position to another position within the same file.
Syntax:
	file-pointer.seek(offset, fromWhere) 
	file-pointer.seek(offset, 0)
	file-pointer.seek(offset)

here:
	offset ==> number of positions
	fromWhere ==> 

Python-3:
	fromWhere ==> default value ==> 0 ==> from the beginning of the file 
Python-2:
	fromWhere:
		0 ==> from beginning
		1 ==> from current position
		2 ==> from end of file

fp = open("abc1.txt","r")

print("The Current Position of the fp = ",fp.tell())

fp.seek(10,0)

print("The Current Position of the fp = ",fp.tell())

fp.seek(20)
print("The Current Position of the fp = ",fp.tell())

fp.seek(10,0)
print("The Current Position of the fp = ",fp.tell())
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How to handle the binary files?
===============================

fp1 = open("python.jpg","rb")
fp2 = open("pythonCopy.jpg","wb")

bytes = fp1.read()
fp2.write(bytes)

binary file modes:
	read ==> rb
	write ==> wb
	append ==> ab
	r+b
	w+b
	a+b
	xb