Independent Secondary index for dictionary

[ichabod801]

The problem with this is that there's two separate dictionaries needed, I'd like it to be self contained

Well, if you put them both in another dict (company_data = {'values': company, 'aliases': company_aliases}), your find_company function is simpler:

def find_company(key):
    return company_data['values'][company_data['aliases'].get(key, key)]