`uerrno` – System Error Code¶

This module implements the corresponding CPython A subset of modules, as follows. Refers to CPython document for details: errno

This module provides access symbol error codes for OSError . Specific code listings depend on MicroPython port.

Constant¶

EEXIST, EAGAIN, etc.

Error Code，based on ANSI C/POSIX standard. All error codes start with “E”. Errors can usually be accessed as exc.args[0] ，amongst exc is OSError as an example.

Example:

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

uerrno.errorcode¶

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

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

Error	Value	Description
`uerrno.EPERM`	1	Operation not permitted
`uerrno.ENOENT`	2	No such file or directory
`uerrno.ESRCH`	3	No such process
`uerrno.EINTR`	4	Interrupted system call
`uerrno.EIO`	5	I/O error
`uerrno.ENXIO`	6	No such device or address
`uerrno.E2BIG`	7	Argument list too long
`uerrno.ENOEXEC`	8	Exec format error
`uerrno.EBADF`	9	Bad file number
`uerrno.ECHILD`	10	No child processes
`uerrno.EAGAIN`	11	Try again
`uerrno.ENOMEM`	12	Out of memory
`uerrno.EACCES`	13	Permission denied
`uerrno.EFAULT`	14	Bad address
`uerrno.ENOTBLK`	15	Block device required
`uerrno.EBUSY`	16	Device or resource busy
`uerrno.EEXIST`	17	File exists
`uerrno.EXDEV`	18	Cross-device link
`uerrno.ENODEV`	19	No such device
`uerrno.ENOTDIR`	20	Not a directory
`uerrno.EISDIR`	21	Is a directory
`uerrno.EINVAL`	22	Invalid argument
`uerrno.ENFILE`	23	File table overflow
`uerrno.EMFILE`	24	Too many open files
`uerrno.ENOTTY`	25	Not a typewriter
`uerrno.ETXTBSY`	26	Text file busy
`uerrno.EFBIG`	27	File too large
`uerrno.ENOSPC`	28	No space left on device
`uerrno.ESPIPE`	29	Illegal seek
`uerrno.EROFS`	30	Read-only file system
`uerrno.EMLINK`	31	Too many links
`uerrno.EPIPE`	32	Broken pipe
`uerrno.EDOM`	33	Math argument out of domain of func
`uerrno.ERANGE`	34	Math result not representable
`uerrno.EWOULDBLOCK`	11	Operation would block
`uerrno.EOPNOTSUPP`	95	Operation not supported on transport endpoint
`uerrno.EAFNOSUPPORT`	97	Address family not supported by protocol
`uerrno.EADDRINUSE`	98	Address already in use
`uerrno.ECONNABORTED`	99	Software caused connection abort
`uerrno.ECONNRESET`	104	Connection reset by peer
`uerrno.ENOBUFS`	105	No buffer space available
`uerrno.EISCONN`	106	Transport endpoint is already connected
`uerrno.ENOTCONN`	107	Transport endpoint is not connected
`uerrno.ETIMEDOUT`	110	Connection timed out
`uerrno.ECONNREFUSED`	111	Connection refused
`uerrno.EHOSTUNREACH`	113	No route to host
`uerrno.EALREADY`	114	Operation already in progress
`uerrno.EINPROGRESS`	115	Operation now in progress

uerrno – System Error Code¶

Constant¶

`uerrno` – System Error Code¶