def df_to_string_list(df):
    """
    Convert the input df into a list of strings, suitable for using as popups in a map.
    This is a utility function.
    """
    # print "Converting df with size %s to string list" % df.shape[0]
    array_list = df.to_dict(orient='records')
    return [str(line) for line in array_list]