I need a pytho nscript to read numbers(with loads of digits) from a

file, do some basic math on it and write the result out to another file.

My problem: I don't get python to use more digits:

In order to try this I type:

The normal precision one:

>>from numpy import *

x=1.23456789123456789123456789

print "%35.25e" %x

1.2345678912345679000000000e+000

Now I try to use float64 to get more digits

>>z=zeros(3,float64)

z[0]

0.0

>>type(z[0])

<type 'numpy.float64'>

>>z[0]=1.23456789123456789123456789

type(z[0])

<type 'numpy.float64'>

>>print "%35.25e" %z[0]

1.2345678912345679000000000e+000

This cuts the digits just like the 32bit case.

Can anyone please help me get more digits?

Thank you very much in advance,

Ulrich