errno – system error codes

This module implements a subset of the corresponding CPython module, as described below. For more information, refer to the original CPython documentation: errno.

This module provides access to symbolic error codes for OSError exception.

Constants

EEXIST, EAGAIN, etc.

Error codes, based on ANSI C/POSIX standard. All error codes start with “E”. Errors are usually accessible as exc.args[0] where exc is an instance of OSError. Usage example:

try:
    os.mkdir("my_dir")
except OSError as exc:
    if exc.args[0] == errno.EEXIST:
        print("Directory already exists")
errno.errorcode

Dictionary mapping numeric error codes to strings with symbolic error code (see above):

>>> print(errno.errorcode[uerrno.EEXIST])
EEXIST