Any tips? I've looked into numpy (which is already used by pyfits, the Python module to read FITS files) but haven't found any methods to convert numbers to strings with the behavior I need.

Python standard library ipaddress used to normalize or parse IP addresses in different formats An IPv4 address can be represented in a variety of formats, including decimal, integer, octal ...

Store records as Decimal types, and use Python's Decimal library for all in-code handling 3. Store all currency values as Integers of the smallest unit of the currency. For USD that would mean ...