从国外下载的人口数据，其人口数量使用了千分位逗号，在进行数据入库时需要将逗号移除，找了几个办法，最终使用了这个方法进行处理：
cat town.csv | perl -pe 's/(?<=\d),(?=\d)//g' > town-new.csv这样就可以直接移除任意多个千分位逗号了。
移除数字千分位的逗号
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《 “移除数字千分位的逗号” 》 有 13 条评论
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