从数据框开始:

In [9]: df
Out[9]:
         date animals  quantity
0  2015-02-10    dogs         1
1  2015-02-11    cats         2
2  2015-02-11    pigs         5

您可以使用pivot方法指定应将哪些列用作索引，列名称和值:

You can use the pivot method specifying which columns should be used as the index, as the column names, and as the values:

In [10]: df.pivot(index='date', columns='animals', values='quantity').fillna(0)
Out[10]:
animals     cats  dogs  pigs
date
2015-02-10     0     1     0
2015-02-11     2     0     5

除了动物"和数量"列之外，这还可以为您提供所需的输出.他们需要在那里吗?

This gets you the desired output, apart from the 'animals' and 'quantity' columns. Are they needed to be there?