def length(s):
    if s is not None:
        return len(s)
    return 0
Get list of source data urls, optionally filtered by year
dataset/ETHPy150Open jasonrbriggs/stomp.py/stomp/utils.py/length--crossover with--dataset/ETHPy150Open openelections/openelections-core/openelex/us/or/datasource.py/Datasource.target_urls