Question

我正在尝试生成报告，然后运行以下代码


    import pandas as pd

    df = pd.read_excel("proposals2020.xlsx", sheet_name="Proposals")

    country_probability = df.groupby(["Country", "Probability"]).count()
    country_probability = country_probability.unstack()
    country_probability = country_probability.fillna("0")
    country_probability = country_probability.drop(country_probability.columns[4:], axis=1)
    country_probability = country_probability.drop(country_probability.columns[0], axis=1)
    country_probability = country_probability.astype(int)

    print(country_probability)

我得到以下结果：

             Quote Number           
Probability          High Low Medium
Country                             
Algeria                 3   1      9
Bahrain                 4   3      2
Egypt                   2   0      3
Iraq                    3   0      8
Jordan                  0   1      1
Lebanon                 0   1      0
Libya                   1   0      0
Morocco                 0   0      2
Pakistan                3  10     11
Qatar                   0   1      1
Saudi Arabia           16   8     19
Tunisia                 2   5      0
USA                     0   1      0

我的问题是如何阻止熊猫按字母顺序对这些列进行排序并保持高，中，低顺序...

Answer 1

`DataFrame.reindex`

@guvectorize(['float64[:,:,:],float64[:,:,:,:],float64[:,:,:]'],'(l,n,m),(k,l,n,m)->(l,n,m)', target='cuda') 
def lstsq(a,b,c):
    k,l,n,m = b.shape
    for i in range(n):
        for j in range(m):
            c[:,i,j] = cp.linalg.lstsq(b[:,:,i,j],a[:,i,j])[0]

如果列中没有MultiIndex：

# if isinstance(df.columns, pd.MultiIndex)
df = df.reindex(['High', 'Medium', 'Low'], axis=1, level=1)

我们还可以尝试在# if isinstance(df.columns, pd.Index) df = df.reindex(['High', 'Medium', 'Low'], axis=1)中传递 sort = False ：

groupby

阻止熊猫对列进行排序

1 个答案:

`DataFrame.reindex`