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Before the advent of databases, Web services and other exotic forms of data storage, had on file. Files will always be part of computing in one form or another. You can learn how to use Python’s file operations to open a file .

open a file in Python

determine the filename you want to open. If the file does not exist, you can automatically create the file with the file name you choose .

Determine whether you will read from the file, write to the file or both .

Check to see if you have the correct permissions to read, write or create the file. You may need to check the permissions of the directory that exists in the file to make sure that you have read and write access. Under a Windows system, you can right click on the file or folder and see the Attribute tab. Under Unix or a Mac OS X, you can write: ls-la myfile.txtto percent check their permits and thenpercent chmod 644 myfile.txtto make sure you have permission to write to the file .

Use the open () method to open a file and create a file object: myfile = open ( “myfile.txt”) That will open or create myfile.txt to read and write .

Know if you want to open a file read-only or just to write, you can pass a second argument to open (). Pass’ r ‘read-only,’ w ‘and only to write’ rw ‘explicit reading and writing. For example: # open a file read-only myfile = open ( ‘myfile.txt’, ‘r’)

sure to call the close () to close all the files once they’ve finished using file, so that later processes access the file: myfile.close

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