[英]Remove groups where there is not at least two difference values within a column in pandas
I have a dataframe such as我有一个 dataframe 比如
COL1 COL2 SP
G1 A SP1
G1 A SP2
G2 B SP1
G2 B SP1
G3 C SP7
G3 C SP3
G4 A SP8
G4 A SP8
And I would like to only keep COL1 COL2 groups where there is at least two different SP names .我只想保留至少有两个不同SP 名称的COL1 COL2组。
I would then get:然后我会得到:
COL1 COL2 SP
G1 A SP1
G1 A SP2
G3 C SP7
G3 C SP3
Let us try transform
with nunique
让我们尝试使用
nunique
进行transform
out = df[df.groupby(['COL1','COL2'])['SP'].transform('nunique')>1]
Out[245]:
COL1 COL2 SP
0 G1 A SP1
1 G1 A SP2
4 G3 C SP7
5 G3 C SP3
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.