Returns the integer file descriptor.

file. fileno()

The integer file descriptor is used by the underlying implementation to request I/O operations from the operating system. This can be useful for other, lower level interfaces that use file descriptors, such as the fcntl module or os.read() and friends.

File-like objects which do not have a real file descriptor should not provide this method!

None

#TODO

>>> f = open(r'C:\aiw.txt')
>>> f.fileno()
3
>>> f1 = open(r'C:\aiw.txt')
>>> f1.fileno()
4

#TODO