File "/Users/mikevk/git/pysystemtrade/private/test1.py", line 8, in <module>
    print('Stats: {st}'.format(st=system.accounts.portfolio().percent().stats()))
  File "/Users/mikevk/git/pysystemtrade/systems/account.py", line 1797, in portfolio
    TorF(delayfill), TorF(roundpositions)))
  File "/Users/mikevk/git/pysystemtrade/systems/basesystem.py", line 635, in calc_or_cache
    value = func(self, instrument_code, this_stage, *args, **kwargs)
  File "/Users/mikevk/git/pysystemtrade/systems/account.py", line 1785, in _portfolio
    roundpositions=roundpositions) for instrument_code in instruments]
  File "/Users/mikevk/git/pysystemtrade/systems/account.py", line 1785, in <listcomp>
    roundpositions=roundpositions) for instrument_code in instruments]
  File "/Users/mikevk/git/pysystemtrade/systems/account.py", line 1100, in pandl_for_instrument
    TorF(delayfill), TorF(roundpositions)))
  File "/Users/mikevk/git/pysystemtrade/systems/basesystem.py", line 635, in calc_or_cache
    value = func(self, instrument_code, this_stage, *args, **kwargs)
  File "/Users/mikevk/git/pysystemtrade/systems/account.py", line 1055, in _pandl_for_instrument
    instrument_code, roundpositions=roundpositions)
  File "/Users/mikevk/git/pysystemtrade/systems/account.py", line 987, in get_buffered_position
    flags="roundpositions%s" % TorF(roundpositions))
  File "/Users/mikevk/git/pysystemtrade/systems/basesystem.py", line 635, in calc_or_cache
    value = func(self, instrument_code, this_stage, *args, **kwargs)
  File "/Users/mikevk/git/pysystemtrade/systems/account.py", line 973, in _get_buffered_position
    instrument_code)
  File "/Users/mikevk/git/pysystemtrade/systems/account.py", line 359, in get_notional_position
    return self.parent.portfolio.get_notional_position(instrument_code)
  File "/Users/mikevk/git/pysystemtrade/systems/portfolio.py", line 346, in get_notional_position
    "get_notional_position", instrument_code, _get_notional_position, self)
  File "/Users/mikevk/git/pysystemtrade/systems/basesystem.py", line 635, in calc_or_cache
    value = func(self, instrument_code, this_stage, *args, **kwargs)
  File "/Users/mikevk/git/pysystemtrade/systems/portfolio.py", line 329, in _get_notional_position
    idm = this_stage.get_instrument_diversification_multiplier()
  File "/Users/mikevk/git/pysystemtrade/systems/portfolio.py", line 296, in get_instrument_diversification_multiplier
    "get_instrument_diversification_multiplier", ALL_KEYNAME, _get_instrument_div_multiplier, self)
  File "/Users/mikevk/git/pysystemtrade/systems/basesystem.py", line 635, in calc_or_cache
    value = func(self, instrument_code, this_stage, *args, **kwargs)
  File "/Users/mikevk/git/pysystemtrade/systems/portfolio.py", line 288, in _get_instrument_div_multiplier
    weight_ts = this_stage.get_instrument_weights().index
  File "/Users/mikevk/git/pysystemtrade/systems/portfolio.py", line 248, in get_instrument_weights
    "get_instrument_weights", ALL_KEYNAME, _get_instrument_weights, self)
  File "/Users/mikevk/git/pysystemtrade/systems/basesystem.py", line 635, in calc_or_cache
    value = func(self, instrument_code, this_stage, *args, **kwargs)
  File "/Users/mikevk/git/pysystemtrade/systems/portfolio.py", line 228, in _get_instrument_weights
    raw_instr_weights = this_stage.get_raw_instrument_weights()
  File "/Users/mikevk/git/pysystemtrade/systems/portfolio.py", line 212, in get_raw_instrument_weights
    "get_raw_instrument_weights", ALL_KEYNAME, _get_raw_instrument_weights, self)
  File "/Users/mikevk/git/pysystemtrade/systems/basesystem.py", line 635, in calc_or_cache
    value = func(self, instrument_code, this_stage, *args, **kwargs)
  File "/Users/mikevk/git/pysystemtrade/systems/portfolio.py", line 192, in _get_raw_instrument_weights
    for instrument_code in instrument_list]
  File "/Users/mikevk/git/pysystemtrade/systems/portfolio.py", line 192, in <listcomp>
    for instrument_code in instrument_list]
  File "/Users/mikevk/git/pysystemtrade/systems/portfolio.py", line 108, in get_subsystem_position
    return self.parent.positionSize.get_subsystem_position(instrument_code)
  File "/Users/mikevk/git/pysystemtrade/systems/positionsizing.py", line 492, in get_subsystem_position
    'get_subsystem_position', instrument_code, _get_subsystem_position, self)
  File "/Users/mikevk/git/pysystemtrade/systems/basesystem.py", line 635, in calc_or_cache
    value = func(self, instrument_code, this_stage, *args, **kwargs)
  File "/Users/mikevk/git/pysystemtrade/systems/positionsizing.py", line 482, in _get_subsystem_position
    vol_scalar = this_stage.get_volatility_scalar(instrument_code)
  File "/Users/mikevk/git/pysystemtrade/systems/positionsizing.py", line 441, in get_volatility_scalar
    'get_volatility_scalar', instrument_code, _get_volatility_scalar, self)
  File "/Users/mikevk/git/pysystemtrade/systems/basesystem.py", line 635, in calc_or_cache
    value = func(self, instrument_code, this_stage, *args, **kwargs)
  File "/Users/mikevk/git/pysystemtrade/systems/positionsizing.py", line 432, in _get_volatility_scalar
    instrument_code)
  File "/Users/mikevk/git/pysystemtrade/systems/positionsizing.py", line 397, in get_instrument_value_vol
    'get_instrument_value_vol', instrument_code, _get_instrument_value_vol, self)
  File "/Users/mikevk/git/pysystemtrade/systems/basesystem.py", line 635, in calc_or_cache
    value = func(self, instrument_code, this_stage, *args, **kwargs)
  File "/Users/mikevk/git/pysystemtrade/systems/positionsizing.py", line 387, in _get_instrument_value_vol
    instrument_code)
  File "/Users/mikevk/git/pysystemtrade/systems/positionsizing.py", line 352, in get_instrument_currency_vol
    'get_instrument_currency_vol', instrument_code, _get_instrument_currency_vol, self)
  File "/Users/mikevk/git/pysystemtrade/systems/basesystem.py", line 635, in calc_or_cache
    value = func(self, instrument_code, this_stage, *args, **kwargs)
  File "/Users/mikevk/git/pysystemtrade/systems/positionsizing.py", line 342, in _get_instrument_currency_vol
    daily_perc_vol = this_stage.get_price_volatility(instrument_code)
  File "/Users/mikevk/git/pysystemtrade/systems/positionsizing.py", line 120, in get_price_volatility
    'get_price_volatility', instrument_code, _get_price_volatility, self)
  File "/Users/mikevk/git/pysystemtrade/systems/basesystem.py", line 635, in calc_or_cache
    value = func(self, instrument_code, this_stage, *args, **kwargs)
  File "/Users/mikevk/git/pysystemtrade/systems/positionsizing.py", line 111, in _get_price_volatility
    instrument_code)
  File "/Users/mikevk/git/pysystemtrade/systems/rawdata.py", line 233, in get_daily_percentage_volatility
    "daily_percentage_volatility", instrument_code, _get_daily_percentage_volatility, self)
  File "/Users/mikevk/git/pysystemtrade/systems/basesystem.py", line 635, in calc_or_cache
    value = func(self, instrument_code, this_stage, *args, **kwargs)
  File "/Users/mikevk/git/pysystemtrade/systems/rawdata.py", line 224, in _get_daily_percentage_volatility
    return_vol = this_stage.daily_returns_volatility(instrument_code)
  File "/Users/mikevk/git/pysystemtrade/systems/rawdata.py", line 195, in daily_returns_volatility
    "daily_returns_volatility", instrument_code, _daily_returns_volatility, self)
  File "/Users/mikevk/git/pysystemtrade/systems/basesystem.py", line 635, in calc_or_cache
    value = func(self, instrument_code, this_stage, *args, **kwargs)
  File "/Users/mikevk/git/pysystemtrade/systems/rawdata.py", line 190, in _daily_returns_volatility
    vol = volfunction(dailyreturns, **volconfig)
  File "/Users/mikevk/git/pysystemtrade/syscore/algos.py", line 146, in robust_vol_calc
    target_col = vol_min.columns[0]
  File "/Users/mikevk/anaconda/lib/python3.4/site-packages/pandas/core/generic.py", line 2665, in __getattr__
    return object.__getattribute__(self, name)
AttributeError: 'Series' object has no attribute 'columns'