def __init__(self, now=None,
                _shift_parent=None,
                _shift_set={},
                _cache_shifted=True):
        if now is None:
            now = datetime.now()
        self._init(now, _shift_parent, _shift_set, _cache_shifted)
Initializes a new context with :py:func:`now` set to now (datetime).
dataset/ETHPy150Open manahl/mdf/mdf/context.py/MDFContext.__init__