Python offers any number of ways to create very Pythonicinterfaces to your objects, natural ways of getting variousbits of information out of them. For an example that is freshto my mind , the len() of M2Crypto 's Cipher objects is the number of bits that the cipher uses.

The M2Crypto example also illustrates the problem with this way ofcreating interfaces: it is not necessarily very intuitive to peopleusing your code. The len() of a cipher being its bits strikes meas