[已解决]请大神帮我看下正则表达式错在哪

futui

源数据
data = '"realtimemarket":null,"indexType":null,"item":["timestamp","current","high","open","low","close","chg","percent","amount","volume","avg"],"data":[["2022-11-17",2385.86,2389.46,2389.46,2351.00,2385.86,-17.05,"-0.71%",570.87,1506.53,null],["2022-11-16",2402.91,2443.79,2427.41,2399.70,2402.91,-28.82,"-1.19%",617.71,1764.51,null],["2022-11-15",2431.73,2432.46,2373.99,2356.35,2431.73,56.52,"2.38%",730.21,2037.30,null],["2022-11-08",2432.40,2460.99,2452.86,2411.72,2432.40,-22.29,"-0.91%",530.44,1345.00,null],["2022-11-07",2454.69,2470.64,2447.13,2432.05,2454.69,3.47,"0.14%",638.18,1656.64,null]]},"tota"'

想要的结果  c= ["timestamp","current","high","open","low","close","chg","percent","amount","volume","avg"]
                  v= [["2022-11-17",2385.86,2389.46,2389.46,2351.00,2385.86,-17.05,"-0.71%",570.87,1506.53,null],["2022-11-16",2402.91,2443.79,2427.41,2399.70,2402.91,-28.82,"-1.19%",617.71,1764.51,null],["2022-11-15",2431.73,2432.46,2373.99,2356.35,2431.73,56.52,"2.38%",730.21,2037.30,null],["2022-11-08",2432.40,2460.99,2452.86,2411.72,2432.40,-22.29,"-0.91%",530.44,1345.00,null],["2022-11-07",2454.69,2470.64,2447.13,2432.05,2454.69,3.47,"0.14%",638.18,1656.64,null]]

我的表达式：c  =  re.findall(r'item\":\[(.*)\],\"data',data)
                   v = re.findall(r'avg\"],\"data\":(.*)},',data)

不知道什么原因，它自动形成列表，多出这么个东西  ：['']  

出来的结果是： c = ['["timestamp","current","high","open","low","close","chg","percent","amount","volume","avg"]'] ，v也同样多出个东西

请大神帮忙修改下，谢谢

最佳答案

月排行榜 / 总排行榜

cflying

2022-12-8 11:24:13

括号分别挪到\[和\]外就好了，另外findall返回的是列表

跳转到最佳答案楼层

cflying

括号分别挪到\[和\]外就好了，另外findall返回的是列表

lxping

你的表达式只能成功匹配一次，我测试了一下结果如下，输出的结果用字符串形式表示：

['"timestamp","current","high","open","low","close","chg","percent","amount","volume","avg"']

你要想以下结果，你的表达式就得匹配成功 len(c) 次：

c= ["timestamp","current","high","open","low","close","chg","percent","amount","volume","avg"]

有些时候看原始数据和你想要的结果，这种情况你用切片不是更简单么

c  =  re.findall(r'item":\[(.*)\],"data',data)

每一次匹配都会成功返回的是（）里面的内容，你要成功匹配，（）外的边界条件就要符合，整个字符串符合 'item\":\['  和  '\],\"data' 的就只有一个，就是下面这一整个

"timestamp","current","high","open","low","close","chg","percent","amount","volume","avg"

futui

cflying 发表于 2022-12-8 11:24
括号分别挪到\[和\]外就好了，另外findall返回的是列表

谢谢指导！加[0]解决