circuitpython/tests/basics/memoryview2.py

# test memoryview accessing maximum values for signed/unsigned elements
try:
    memoryview
except:
    print("SKIP")
    raise SystemExit
try:
    from array import array
except ImportError:
    print("SKIP")
    raise SystemExit

print(list(memoryview(b'\x7f\x80\x81\xff')))
print(list(memoryview(array('b', [0x7f, -0x80]))))
print(list(memoryview(array('B', [0x7f, 0x80, 0x81, 0xff]))))
print(list(memoryview(array('h', [0x7f00, -0x8000]))))
print(list(memoryview(array('H', [0x7f00, 0x8000, 0x8100, 0xffff]))))
py/objstr: Binary type of str/bytes for buffer protocol is 'B'. The type is an unsigned 8-bit value, since bytes objects are exactly that. And it's also sensible for unicode strings to return unsigned values when accessed in a byte-wise manner (CPython does not allow this). 2016-05-07 16:18:17 -04:00			`# test memoryview accessing maximum values for signed/unsigned elements`
tests/basic/: Make various tests skippable. To run the testsuite on small ports. 2017-02-15 10:11:16 -05:00			`try:`
			`memoryview`
			`except:`
			`print("SKIP")`
tests/basics: Convert "sys.exit()" to "raise SystemExit". 2017-06-10 13:03:01 -04:00			`raise SystemExit`
tests: Rename "array" module to "uarray". 2019-10-22 02:33:23 -04:00			`try:`
tests: Replace umodule with module everywhere. This work was funded through GitHub Sponsors. Signed-off-by: Jim Mussared <jim.mussared@gmail.com> 2022-08-18 02:57:45 -04:00			`from array import array`
tests: Rename "array" module to "uarray". 2019-10-22 02:33:23 -04:00			`except ImportError:`
tests: Replace umodule with module everywhere. This work was funded through GitHub Sponsors. Signed-off-by: Jim Mussared <jim.mussared@gmail.com> 2022-08-18 02:57:45 -04:00			`print("SKIP")`
			`raise SystemExit`
py/objstr: Binary type of str/bytes for buffer protocol is 'B'. The type is an unsigned 8-bit value, since bytes objects are exactly that. And it's also sensible for unicode strings to return unsigned values when accessed in a byte-wise manner (CPython does not allow this). 2016-05-07 16:18:17 -04:00
			`print(list(memoryview(b'\x7f\x80\x81\xff')))`
			`print(list(memoryview(array('b', [0x7f, -0x80]))))`
			`print(list(memoryview(array('B', [0x7f, 0x80, 0x81, 0xff]))))`
			`print(list(memoryview(array('h', [0x7f00, -0x8000]))))`
			`print(list(memoryview(array('H', [0x7f00, 0x8000, 0x8100, 0xffff]))))`