[openbabel-scripting] Multiple molecule conversion

[Noel O'B. <no...@ca...>]

How is the API used for multiple molecule conversion?

A typical use case for cheminformaticians is manipulating SD files. For
example, I want
(1) to read in an .SD file containing ~1 million molecules (let's
pretend I work in big pharma)
(2) to add a field containing the molecular weight 
(3) to write out a new .SD file with the new field

Could you give me a few pointers on using .SD files in this way?

It seems that OBConversion.ReadFile(OBMolecule) just reads in the first
molecule, and I cannot see a way of iterating over the molecules.

Regards,
 Noel