python - 类型错误 : pivot_table() got multiple values for keyword argument 'values'

Question

我正在使用 Python2.7。我正在学习 Pandas 并正在实现数据透视表。在实现 pivot_table documentation 中给出的示例时:

    raw_data = {'A':['foo','foo','foo','foo','foo','bar','bar','bar','bar'],
        'B':['one','one','one','two','two','one','one','two','two'],
        'C':['small','large','large','small','small','large','small','small','large'],
        'D':[1,2,2,3,3,4,5,6,7]}
    df = pd.DataFrame(raw_data)
    df.pivot_table(df,index = ['A','B'], values = 'D',columns = 'C', aggfunc = 'sum')

运行时，出现以下错误:类型错误:pivot_table() 为关键字参数“值”获取了多个值

谁能告诉我为什么会这样？

Answer 1

您需要删除 df:

              #here      
df.pivot_table(df,index = ['A','B'], values = 'D',columns = 'C', aggfunc = 'sum')

---

a = df.pivot_table(index = ['A','B'], values = 'D',columns = 'C', aggfunc = 'sum')
print (a)
C        large  small
A   B                
bar one    4.0    5.0
    two    7.0    6.0
foo one    4.0    1.0
    two    NaN    6.0