gistfile1.py

from collections import namedtuple

Infos = namedtuple('Infos', ["bias"," threshold", "alignment"])

# information about runs 1234 and 1235
run_info = {1234: Infos(12.3, 2., 42.),
            1235: Infos(12.2, 2.1, 42.3)}
            
# retrieve it
print run_info[1234]
# run 1234 bias voltage
print run_info[1234].bias