errno – system error codes

This module provides access to symbolic error codes for OSError exception, along with the errorcode dictionary mapping numeric codes back to their symbolic names. The particular inventory of codes depends on the MicroPython port.

Constants

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 MicroPython port. Errors are usually accessible as exc.errno where exc is an instance of OSError. Usage example:

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

errno.errorcode: dict[int, str]

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

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