weights.py

class RoutingWeights:

    def __init__(self):
        self.Weightings = {
            'motorway': {'car': 10},
            'trunk':    {'car': 10, 'cycle': 0.05},
            'primary':  {'cycle': 0.3, 'car': 2, 'foot': 1, 'horse': 0.1},
            'secondary': {'cycle': 1, 'car': 1.5, 'foot': 1, 'horse': 0.2},
            'tertiary': {'cycle': 1, 'car': 1, 'foot': 1, 'horse': 0.3},
            'unclassified': {'cycle': 1, 'car': 1, 'foot': 1, 'horse': 1},
            'minor': {'cycle': 1, 'car': 1, 'foot': 1, 'horse': 1},
            'cycleway': {'cycle': 3, 'foot': 0.2},
            'residential': {'cycle': 3, 'car': 0.7, 'foot': 1, 'horse': 1},
            'track': {'cycle': 1, 'car': 1, 'foot': 1, 'horse': 1, 'mtb': 3},
            'service': {'cycle': 1, 'car': 1, 'foot': 1, 'horse': 1},
            'bridleway': {'cycle': 0.8, 'foot': 1, 'horse': 10, 'mtb': 3},
            'footway': {'cycle': 0.2, 'foot': 1},
            'steps': {'foot': 1, 'cycle': 0.3},
            'rail': {'train': 1},
            'light_rail': {'train': 1},
            'subway': {'train': 1}
            }

    def get(self, transport, wayType):
        try:
            return(self.Weightings[wayType][transport])
        except KeyError:
            # Default: if no weighting is defined, then assume it can't be
            # routed
            return(0)