recipe-475199.py 文件源码

def __delitem__(self, i):
        size = self.size
        if i >= size:
            raise IndexError("list index out of range")

        if i < 0:
            i = size + i
            if i < 0:
                raise IndexError("list index out of range")

        # shift everything left by one
        address = ctypes.addressof(self.data)
        typesize = self._typesize
        to_address = address + i*typesize
        from_address = to_address + typesize
        ctypes.memmove(to_address, from_address, typesize*(size-i-1))

        self.size = size = size-1

        if self.prealloc_size > size*2:
            self.compact()