Need for the close function

Question

Why is it necessary to use the close function. Doesn't Python automatically close the file after the program is run?

Answer 1

Nope python doesn't do it for you, you can make it automatic with a try finally statement:
try:
#openfile, do something
finally: #no matter what happens
file.close()

Answer 2

You can have statement like
--> with open(filename):
This will automatically close your file

Answer 3

@Viswanathan , can you explain it Better? i didn't understand

Answer 4

you got to close it to make the file to be updated when you write it... it will be saved with the new text (when you are in writing mode)

Answer 5

the .close() is saving the changes you've done to the file