Python 3 – os.close() Method
In Python programming, the os module provides a set of functions to interact with the operating system. One important function in the os module is the close() method. The os.close() method is used to close a file descriptor. In this article, we will learn more about the os.close() method and its functionality.
Syntax
The syntax for the os.close() method is as follows:
os.close(fd)
Here, fd is the file descriptor that needs to be closed.
Parameters
The os.close() method takes a single parameter:
- fd: This is a file descriptor that needs to be closed.
Return Value
The os.close() method returns None on success.
Example
Let’s take a look at an example to understand how the os.close() method works:
import os
# open a file
file = open("example.txt", "w")
# get file descriptor
fd = file.fileno()
# close file descriptor
os.close(fd)
In this example, we first open a file called example.txt in write mode. We then use the fileno() method of the file object to get the file descriptor associated with the file. Finally, we pass the file descriptor to the os.close() method to close the file.
Important Points to Remember
- The os.close() method is used to close a file descriptor.
- The file descriptor can be obtained using the fileno() method of the file object.
- The os.close() method returns None on success.
Conclusion
The os.close() method is a simple yet powerful method in the os module of Python programming. It allows you to close a file descriptor with ease. To close a file, you simply need to pass the file descriptor to the os.close() method. In this article, we have learned about the syntax, parameters, and return value of the os.close() method.