javascript - Read in Data from MongoDB directly to a D3 geojson Graphic -

i have a mongodb setup access through python library pymongo , i'm looking efficient way import data format can access through java script library d3. realize mongodb uses bisons store data, i'm looking create automated data visualizations, based on pymongo query parameters.

specifically data represents flow between 2 cities , weight edge.

data{ {'from': 'seattle'},       {'to': 'spokane'},       {'weight':8}} 

i have geojson file , visualizations want create on map, need way bring data js while keeping similar format. ideally similar tuple, like:

('seattle','spokane',8) 

thanks in adavnace!