def get_file_name(filename):
    return os.path.basename(filename)
http://en.wikipedia.org/wiki/Alpha_(investment)
dataset/ETHPy150Open mardix/flask-cloudy/flask_cloudy.py/get_file_name--crossover with--dataset/ETHPy150Open quantopian/zipline/zipline/finance/risk/cumulative.py/RiskMetricsCumulative.calculate_alpha