File Handling in Python

FileHandling

Storing, reading, working with files of an operating system
Types of File modes available 

'r' : reading mode, this is the default mode which allows you to read the file not any modifications to the file.

'w': writing mode, this can be used for creating the new file as well. 

'a': append mode, this is used to write the data to the end of the file, it does not clears any existing data. 

#read(): read the contents from a text file
with open('myfile.txt', 'r') as f:
    print(f.read())
#readline():read the contents line by line from a text file
with open('myfile.txt', 'r') as objFile:
    contents = objFile.readline()
    print(contents)
#readlines():returns the list containing all the lines from a text file
with open('myfile.txt', 'r') as objFile:
    contents = objFile.readlines()
    print(contents)
#read the data with certain limit
size_to_read = 10
with open('myfile.txt','r') as f:
    print(f.read(size_to_read))