def distance(self, key_one, key_two):
"""
Calculate the XOR result between two string variables returned as a
long type value.
"""
val_key_one = hex_to_long(key_one)
val_key_two = hex_to_long(key_two)
return val_key_one ^ val_key_two
def test_hex_to_long(self):
"""
Ensure a valid hex value produces the correct result.
"""
raw = 'abcdef0123456789'
result = hex_to_long(raw)
self.assertEqual(raw, long_to_hex(result))
def key_in_range(self, key):
"""
Checks if a key is within the range covered by this k-bucket. Returns
a boolean to indicate if a certain key should be placed within this
k-bucket.
"""
if isinstance(key, str):
key = hex_to_long(key)
return self.range_min <= key < self.range_max
def _kbucket_index(self, key):
"""
Returns the index of the k-bucket responsible for the specified key
string.
"""
if isinstance(key, str):
key = hex_to_long(key)
# Bound check for key too small.
if key < 0:
raise ValueError('Key out of range')
for i, bucket in enumerate(self._buckets):
if bucket.key_in_range(key):
return i
# Key was too big given the key space.
raise ValueError('Key out of range.')
