pyfolio/utils.py
def get_symbol_rets(symbol, start=None, end=None):
    """
    Calls the currently registered 'returns_func'

    Parameters
    ----------
    symbol : object
        An identifier for the asset whose return
        series is desired.
        e.g. ticker symbol or database ID
    start : date, optional
        Earliest date to fetch data for.
        Defaults to earliest date available.
    end : date, optional
        Latest date to fetch data for.
        Defaults to latest date available.

    Returns
    -------
    pandas.Series
        Returned by the current 'returns_func'
    """

    return SETTINGS['returns_func'](symbol,
                                    start=start,
                                    end=end)
def get_symbol_rets(symbol, start=None, end=None):
    """
    Calls the currently registered 'returns_func'

    Parameters
    ----------
    symbol : object
        An identifier for the asset whose return
        series is desired.
        e.g. ticker symbol or database ID
    start : date, optional
        Earliest date to fetch data for.
        Defaults to earliest date available.
    end : date, optional
        Latest date to fetch data for.
        Defaults to latest date available.

    Returns
    -------
    pandas.Series
        Returned by the current 'returns_func'
    """

    return SETTINGS['returns_func'](symbol,
                                    start=start,
                                    end=end)
Calls the currently registered 'returns_func'

    Parameters
    ----------
    symbol : object
        An identifier for the asset whose return
        series is desired.
        e.g. ticker symbol or database ID
    start : date, optional
        Earliest date to fetch data for.
        Defaults to earliest date available.
    end : date, optional
        Latest date to fetch data for.
        Defaults to latest date available.

    Returns
    -------
    pandas.Series
        Returned by the current 'returns_func'