python - Mongodb中数组元素的个数统计
本文介绍了python - Mongodb中数组元素的个数统计的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
问 题
集合中的记录格式如下:
{"ID":"0001",
"Fir":"0",
"Sec":"1",
"FirCard_NE":["0402003","0101002","0201001","0503001","0402003","0204001","0204002","0301001","0101001","0402003","0501001","0501002","0503001","0503002","0501002"],
"SecCard_NE":["0101001","0101001","0201001","0202001","0203001","0204001","0204002","0301001","0301004","0204001","0501001","0501002","0503001","0503002","0301004"]
}
现在想统计在"Fir"为"0"的情况下,FirCard_NE字段中某个数组元素在整个集合中出现的次数
(如统计在"Fir"为"0"的情况下,FirCard_NE中出现"0402003"的总次数)
解决方案
if d['Fir'] == '0':
print(d['FirCard_NE'].count('0402003'))
这篇关于python - Mongodb中数组元素的个数统计的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文