Length of the Paris subway lines in 2017

The source wanted to assess the length of the Paris subway lines in 2017, by line. Thus, the shortest Paris metro line was line 3 bis, which was only one kilometer long. The longest one was line eight, with 23 kilometers.数据源旨在评估2017年巴黎地铁线路的长度，按线路划分。因此，最短的巴黎地铁线路为3bis线路，其长度仅为1公里。而最长的线路为8号线，全长达到23公里。