circuitpython/tests/basics/io_bytesio_ext2.py

import io

a = io.BytesIO(b"foobar")
try:
    a.seek(-10)
except Exception as e:
    # CPython throws ValueError, but MicroPython has consistent stream
    # interface, so BytesIO raises the same error as a real file, which
    # is OSError(EINVAL).
    print(type(e), e.args[0] > 0)
remove last uses of 'u' prefix 2023-08-22 11:15:46 -04:00			`import io`
py/stream: seek: Consistently handle negative offset for SEEK_SET. Per POSIX, this is EINVAL, so raises OSError(EINVAL). 2017-08-20 14:57:36 -04:00
			`a = io.BytesIO(b"foobar")`
			`try:`
			`a.seek(-10)`
			`except Exception as e:`
			`# CPython throws ValueError, but MicroPython has consistent stream`
			`# interface, so BytesIO raises the same error as a real file, which`
			`# is OSError(EINVAL).`
tests/io/bytesio_ext2: Remove dependency on specific EINVAL value If MICROPY_USE_INTERNAL_ERRNO is disabled, MP_EINVAL is not guaranteed to have the value 22, so we cannot depend on OSError(22,). Instead, to support any given port's errno values, without relying on uerrno, we just check that the args[0] is positive. 2018-04-30 21:59:23 -04:00			`print(type(e), e.args[0] > 0)`