uerrno – system error codes

Warning

Though this MicroPython-based library may be available for use in some builds of CircuitPython, it is unsupported and its functionality may change in the future, perhaps significantly. As CircuitPython continues to develop, it may be changed to comply more closely with the corresponding standard Python library. You will likely need to change your code later if you rely on any non-standard functionality it currently provides.

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] == uerrno.EEXIST:
        print("Directory already exists")

uerrno.errorcode

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

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