Ezio Melotti added the comment:
Usually we add plain Python equivalents when they are simple enough that the
code equivalent is as understandable as the prose or more (see for example
http://docs.python.org/3/library/functions.html#all, or the itertools functions
you mentioned).
For this case I think it would help if you presented an equivalent function,
e.g.:
def to_bytes(n, length, order):
if order == 'little':
return bytes((n >> i*8) & 0xff for i in range(length))
elif order == 'big':
return bytes((n >> i*8) & 0xff for i in reversed(range(length)))
or even:
def to_bytes(n, length, order):
indexes = range(length) if order == 'little' else reversed(range(length))
return bytes((n >> i*8) & 0xff for i in indexes)
This is also done for
http://docs.python.org/3.3/library/stdtypes.html#int.bit_length just above
to/from_bytes, so it might be a good addition.
If this is done, the equivalent function can also be added to the test suite,
so we can verify that it's indeed equivalent.
----------
keywords: +easy
stage: -> needs patch
versions: +Python 2.7, Python 3.2, Python 3.4
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