The Python file fileno() method is used to return the file descriptor of the file stream as a number. The method raises an exception if the operating system does not use a file descriptor.
file.fileno()
No parameter is required.
In the below example, Python fileno() method is used to return the file descriptor of the file stream of file called MyFile.
MyFile = open("python_test.txt", "r")
#file descriptor of the file stream
x = MyFile.fileno()
print(x)
3
