:mod:`uerrno` -- system error codes

.. module:: uerrno
 :synopsis: system error codes

|see_cpython_module| :mod:`python:errno`.

This module provides access to symbolic error codes for OSError exception. A particular inventory of codes depends on :term:`MicroPython port`.

Constants

.. data:: EEXIST, EAGAIN, etc.

 Error codes, based on ANSI C/POSIX standard. All error codes start with
 "E". As mentioned above, inventory of the codes depends on
 :term:`MicroPython port`. Errors are usually accessible as ``exc.args[0]``
 where ``exc`` is an instance of `OSError`. Usage example::

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

.. data:: errorcode

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

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

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