def b10(res, req, resp):
    if req.method in res.allowed_methods(req, resp):
        return True
    return False
returns datetime.date object or None if empty/unparsable by current format
dataset/ETHPy150Open benoitc/dj-webmachine/webmachine/decisions.py/b10--crossover with--dataset/ETHPy150Open pyjs/pyjs/pyjswidgets/pyjamas/ui/Calendar.py/DateField.getDate