def test_compat_range():
l1 = _range(3)
assert isinstance(l1, list)
assert hasattr(l1, 'pop')
assert l1 == [0, 1, 2]
it = _iter_range(3)
assert not isinstance(it, list)
assert hasattr(it, '__iter__')
assert it != [0, 1, 2]
assert list(it) == [0, 1, 2]
def test_compat_range():
l1 = _range(3)
assert isinstance(l1, list)
assert hasattr(l1, 'pop')
assert l1 == [0, 1, 2]
it = _iter_range(3)
assert not isinstance(it, list)
assert hasattr(it, '__iter__')
assert it != [0, 1, 2]
assert list(it) == [0, 1, 2]
def bytes_to_bits():
"""
:return: A 256 element list containing 8-bit binary digit strings. The
list index value is equivalent to its bit string value.
"""
lookup = []
bits_per_byte = _range(7, -1, -1)
for num in range(256):
bits = 8 * [None]
for i in bits_per_byte:
bits[i] = "01"[num & 1]
num >>= 1
lookup.append("".join(bits))
return lookup
def bytes_to_bits():
"""
:return: A 256 element list containing 8-bit binary digit strings. The
list index value is equivalent to its bit string value.
"""
lookup = []
bits_per_byte = _range(7, -1, -1)
for num in range(256):
bits = 8 * [None]
for i in bits_per_byte:
bits[i] = '01'[num & 1]
num >>= 1
lookup.append(''.join(bits))
return lookup