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Python | os.supports_fd object

  • Last Updated : 18 Jun, 2019

OS module in Python provides functions for interacting with the operating system. OS comes under Python’s standard utility modules. This module provides a portable way of using operating system dependent functionality.

Some method in OS module permit specifying their path parameter as an open file descriptor (fd). As different platforms provide different functionality, fd parameter might be supported on one platform but not supported on another. os.supports_fd method in Python is a set object which indicates which methods in the OS module permit specifying their path parameter as an open file descriptor.

Whether a particular method permits specifying its path parameter as an open file descriptor or not, can be checked using in operator on os.supports_fd .
For example:
Below expression checks whether os.stat() method permits specifying their path parameter as an open file descriptor or not when called on your local platform.

os.stat in os.supports_fd

Syntax: os.supports_fd

Parameter: This is a non callable set object. Hence, no parameter is required.



Return Type: This method returns a set object which represents the methods in the OS module, which permits specifying their path parameter as an open file descriptor.

Code #1: Use of os.supports_fd object




# Python program to explain os.supports_fd object  
  
# importing os module 
import os
  
  
# Get the list of all methods
# which permits specifying
# their path parameter as 
# an open file descriptor.
methodList = os.supports_fd
  
# Print the list
print(methodList)
Output:
{<built-in function execve>, <built-in function stat>, <built-in function truncate>,
<built-in function statvfs>, <built-in function chown>, <built-in function listdir>,
<built-in function chmod>, <built-in function utime>, <built-in function pathconf>,
<built-in function chdir>}
Code #2: Use of os.supports_fd object to check if a particular method permits specifying their path parameter as an open file descriptor or not.




# Python program to explain os.supports_fd object  
  
# importing os module 
import os
  
  
# Check whether os.stat() method
# permits specifying their path parameter
# as an open file descriptor or not
support = os.stat in os.supports_fd
  
# Print result
print(support)
  
  
# Check whether os.remove() method
# permits specifying their path parameter
# as an open file descriptor or not
support = os.remove in os.supports_fd
  
# Print result
print(support)
Output:
True
False

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