all Python 3osfunction

os.close

os — file descriptors

Close a file descriptor.

Syntax

os.close(fd)

Closing twice raises OSError, but the worse danger is that the number may already belong to another open file, and a stray close shuts that one instead. If the descriptor is wrapped in a file object via os.fdopen or open(fd), close it through the object — otherwise the object will later close a number that is no longer its own.

Examples

import os
r, w = os.pipe()
print(os.close(r) is None)   # → True
os.close(w)

See also

Common errors

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