Python Array



class Array(object):

def __init__(self, length = 0, baseIndex = 0):
assert length >= 0
self._data = [ None for i in xrange(length) ]
self._baseIndex = baseIndex
def __copy__(self):
result = Array(len(self._data))
for i, datum in enumerate(self._data):
result._data[i] = datum
result._baseIndex = self._baseIndex
return result
def getOffset(self, index):
offset = index - self._baseIndex
if offset < 0 or offset >= len(self._data):
raise IndexError
return offset

def __getitem__(self, index):
return self._data[self.getOffset(index)]

def __setitem__(self, index, value):
self._data[self.getOffset(index)] = value
def getData(self):
return self._data

data = property(
fget = lambda self: self.getData())

def getBaseIndex(self):
return self._baseIndex

def setBaseIndex(self, baseIndex):
self._baseIndex = baseIndex

baseIndex = property(
fget = lambda self: self.getBaseIndex(),
fset = lambda self, value: self.setBaseIndex(value))

def __len__(self):
return len(self._data)

def setLength(self, value):
if len(self._data) != value:
newData = [ None for i in xrange(value) ]
m = min(len(self._data), value)
for i in xrange(m):
newData[i] = self._data[i]
self._data = newData

length = property(
fget = lambda self: self.__len__(),
fset = lambda self, value: self.setLength(value))
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