How to interconvert InChI and InChIKey? I would like to retrieve IDs from several databases using InChI as an input, e.g.

InChI=1S/C6H14N2O2/c7-4-2-1-3-5(8)6(9)10/h5H,1-4,7-8H2,(H,9,10)/t5-/m0/s1


One can use unichem from bioservices for this, however, these functions all require the InChIKey as input, e.g.

KDXKERNSBIXSRK-YFKPBYRVSA-N


Is it possible to interconvert the two using bioservices and if not is it possible to somehow use the functions in unichem with InChI rather than the InChIKey?

I tried:

from bioservices import *
u = UniChem()
u.get_src_compound_ids_from_inchikey('KDXKERNSBIXSRK-YFKPBYRVSA-N')


which works fine, however, 

u.get_src_compound_ids_from_inchikey('InChI=1S/C6H14N2O2/c7-4-2-1-3-5(8)6(9)10/h5H,1-4,7-8H2,(H,9,10)/t5-/m0/s1')


does not work and returns 400.

If it is not passible via bioservices, is there any other python API available for this?
Recently I've developed a python lib for converting InChI to InChIKey: https://github.com/liwt31/chembl_ikey. Maybe it will help.