Convert a datatime object from UTC time to local time.

    Adopted from:
    http://stackoverflow.com/questions/4770297/python-convert-utc-datetime-string-to-local-datetime

    Parameters
    ----------
    timestamp : string
        Default string representation of timestamps expected to be in
        UTC time zone

    Returns
    -------
    datetime
        Datetime object in local time zone

def to_local_time(timestamp):
    """Convert a datatime object from UTC time to local time.

    Adopted from:
    http://stackoverflow.com/questions/4770297/python-convert-utc-datetime-string-to-local-datetime

    Parameters
    ----------
    timestamp : string
        Default string representation of timestamps expected to be in
        UTC time zone

    Returns
    -------
    datetime
        Datetime object in local time zone
    """
    utc = dt.datetime.strptime(timestamp, '%Y-%m-%dT%H:%M:%S.%f')
    # Get UTC and local time zone
    from_zone = tz.gettz('UTC')
    to_zone = tz.tzlocal()

    # Tell the utc object that it is in UTC time zone
    utc = utc.replace(tzinfo=from_zone)

    # Convert time zone
    return utc.astimezone(to_zone)