CRUD Operations

open() function is used to do CRUD(create,read,update,delete) operations on files in Python.

Syntax of open function

open(filename,mode)

• filename - specifies the name of the file
• mode - r(read), w(write), a(append), x(exclusive creation)
• Along with the above mode options, you can also specify the operation mode as either t(text) or b(binary)

Create

Use open() function with x (exclusive creation - fails if file exists), w (write - creates if doesn't exist), or a (append - creates if doesn't exist) as mode.

Example

with open("myfile.txt","x") as file:
    file.write("File created!")

Read

Use open() function with r as mode.

Example

with open("myfile.txt","r") as file:
    print(file.read())

Update or Append

Use open() function with a or w as mode.

Example

with open("myfile.txt","a") as file:
    file.write("Happy learning!!")

Delete

For deleting files, you must import os module and use os.remove() function.

Example

import os
os.remove(filename)