Strange behavior related to value / reference

[Peter Otten]

Lambda wrote:

> I defined a function to raise a 2x2 matrix to nth power:

> BTW, numpy has such a function, but it doesn't support really large
> number.
> Does numpy has some functions that support arbitrarily large number?

You can tell it to use Python instead of C integers:

>>> import numpy
>>> m = numpy.matrix([[1,2],[3,4]], dtype=object)
>>> m**100
matrix([[2477769229755647135316619942790719764614291718779321308132883358976984999,
         3611168042210422417525189130504685706095268999850398812464239094782237250],
        [5416752063315633626287783695757028559142903499775598218696358642173355875,
         7894521293071280761604403638547748323757195218554919526829242001150340874]], 
dtype=object)

Peter