展开python数据框中的行

我有一个数据框，如下所示：

Name Description Count
a     This is a   3
b     This is b   2
c     This is c   1

Name Description Count
a     This is a   1
a     This is a   1
a     This is a   1
b     This is b   1
b     This is b   1
c     This is c   1

我想按如下方式修改此数据帧：

Name Description Count
a     This is a   3
b     This is b   2
c     This is c   1

Name Description Count
a     This is a   1
a     This is a   1
a     This is a   1
b     This is b   1
b     This is b   1
c     This is c   1

基本上，按特定列的值复制每一行

我是python新手，还不熟悉库。

尝试使用repeat重新索引

尝试使用repeat重新索引