Pivot table 转换生成 pandas 中的值错误

Question

我正在从包含

的 table 中获取数据

execution_time, type, status, process, sub_process, value 
2018-11-12 16:09:48.179547, backlog, started, p1, s1, 100
2018-11-12 16:09:48.179547, backlog, created, p1, s1, 1005
2018-11-12 16:09:48.179547, backlog, started, p2, s1, 500
2018-11-12 16:09:48.179547, V1, created, p1, s1, 10
2018-11-12 16:09:48.179547, V2, created, p1, s1, 15
2018-11-12 16:09:48.179547, backlog, started, p3, s1, 0
2018-11-12 16:09:48.179547, backlog, started, p4, s1, 45
2018-11-12 16:09:48.179547, V1, started, p4, s1, 400

我想旋转这些数据，使其应该像这样：

状态，进程，sub_process，积压，V1，V2

(backlog，V1和V2如果有的话应该有对应的值) 这是我的代码。我收到错误

pivot_table() got multiple values for argument 'values'

sql = "select * from temp.data_table"
cursor.execute(sql)
results = cursor.fetchall()
df = pd.DataFrame(results)
df=df.pivot_table(index=['status','process','sub_process'],columns='type',values='value', aggfunc = 'sum')

Answer 1

使用（删除 pivot_table 中的 df ）

df.pivot_table(index=['status','process','sub_process'],columns='type',values='value', aggfunc = 'sum')
Out[85]: 
type                             V1    V2   backlog
status   process sub_process                       
 created  p1      s1           10.0  15.0    1005.0
 started  p1      s1            NaN   NaN     100.0
          p2      s1            NaN   NaN     500.0
          p3      s1            NaN   NaN       0.0
          p4      s1          400.0   NaN      45.0

或pd.pivot_table

pd.pivot_table(df,index=['status','process','sub_process'],columns='type',values=['value'], aggfunc = 'sum')
Out[86]: 
                              value               
type                             V1    V2  backlog
status   process sub_process                      
 created  p1      s1           10.0  15.0   1005.0
 started  p1      s1            NaN   NaN    100.0
          p2      s1            NaN   NaN    500.0
          p3      s1            NaN   NaN      0.0
          p4      s1          400.0   NaN     45.0

Pivot table 转换生成 pandas 中的值错误

Pivot table conversion generating value error in pands

python

pandas

cursor

pivot