p3.py 文件源码

def extract_days(input_delta):
    """
    Helper function to extract the number of days from a time delta. Returns:
     - Number of days, if valid time delta
     - np.NaN if time delta is null or invalid
    :param input_delta:
    :return: number of days in time delta
    :rtype: float
    """

    # Attempt to coerce into Pandas time delta
    delta = pd.Timedelta(input_delta)

    # Attempt to extract number of days
    days = np.NaN
    if pd.notnull(delta):
        days = delta.days

    # Return result
    return days