File Handling in Python | Python File Handling

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Python Notes:
In this video I have explained python file handling, how to read file in python, how to write file in python, how to dump file in python, how to read text file in python, how to read json file in python, how to write json file in python and how to use exception and file handling.

Python is a great language for data processing and file handling, and this video will help you understand how to read and write files using Python. By the end of this video, you'll be able to read a file in Python like a pro!
Read and Write File: Files are everywhere: on computers, mobile devices, and across the cloud. Working with files is essential for every programmer, regardless of which programming language you're using.
File handling is a mechanism for creating a file, writing data, and reading data from it. The good news is that Python is enriched with packages for handling different file types.

There are following operations:
open()
read()
readline()
readlines()
write()
close()
dumps()
dump()
load()

Example:
f = open('test.txt', 'r')
print(f.read())

The first argument is a string containing the filename. The second argument is another string containing a few characters describing the way in which the file will be used. mode can be 'r' when the file will only be read, 'w' for only writing (an existing file with the same name will be erased), and 'a' opens the file for appending; any data written to the file is automatically added to the end. 'r+' opens the file for both reading and writing. The mode argument is optional; 'r' will be assumed if it's omitted.

Mode Description
'r' It opens a file for reading only.
'w' It opens a file for writing. If the file exists, it overwrites it, otherwise, it creates a new file.
'a' It opens a file for appending only. If the file doesn't exist, it creates the file.
'x' It creates a new file. If the file exists, it fails.
'+' It opens a file for updating.

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