human
What is a the Python program you requested given the following:
Complete the below
def _transform(providers, transform_fun, out_mapping_type=dict):

    ''''Syntactic sugar for transforming a providers dict.
    transform_fun takes a (vpkg, pset) mapping and runs it on each
    pair in nested dicts.'
    '''
assistant
#Here is the Python program you requested.
    def mapiter(mappings):
        if isinstance(mappings, dict):
            return iteritems(mappings)
        else:
            return iter(mappings)
    return dict(((name, out_mapping_type([transform_fun(vpkg, pset) for (vpkg, pset) in mapiter(mappings)])) for (name, mappings) in providers.items()))