Question

我有以下pandas数据框：

                                             0   value
name                    ga:browserVersion                  
Chrome 44.18            43.0.2357.130      0.139987   14.0%
                        43.0.2357.124      0.113107  11.31%
                        43.0.2357.134      0.103564  10.36%
                        44.0.2403.155      0.093181   9.32%
                        43.0.2357.81       0.092643   9.26%
                        44.0.2403.157      0.082780   8.28%
                        44.0.2403.125      0.070978    7.1%
                        44.0.2403.130      0.066152   6.62%
                        43.0.2357.132      0.064872   6.49%
                        44.0.2403.107      0.039940   3.99%
Internet Explorer 32.12 11.0               0.769828  76.98%
                        9.0                0.101842  10.18%
                        10.0               0.063672   6.37%
                        8.0                0.057929   5.79%
                        7.0                0.006320   0.63%
                        6.0                0.000353   0.04%
                        7.0b               0.000024    0.0%
                        999.1              0.000024    0.0%
                        10.6               0.000003    0.0%
                        5.5                0.000003    0.0%
Firefox 12.76           39.0               0.404164  40.42%
                        38.0               0.340139  34.01%
                        40.0               0.139032   13.9%
                        31.0               0.043926   4.39%
                        37.0               0.012160   1.22%
                        36.0               0.006963    0.7%
                        34.0               0.005601   0.56%
                        35.0               0.005495   0.55%
                        21.0               0.003508   0.35%
                        33.0               0.003209   0.32%
Safari 9.37             8.0.6              0.174829  17.48%
                        8.0.7              0.172087  17.21%
                        7.1.6              0.077686   7.77%
                        5.1.9              0.072729   7.27%
                        6.1.6              0.067831   6.78%
                        7.1.7              0.053092   5.31%
                        8.0.5              0.052637   5.26%
                        8.0.3              0.035921   3.59%
                        8.0.8              0.030222   3.02%
                        8.0.4              0.027923   2.79%
Opera 0.56              30.0.1835.125      0.220076  22.01%
                        30.0.1835.88       0.163912  16.39%
                        30.0.1835.59       0.123083  12.31%
                        31.0.1889.99       0.114718  11.47%
                        31.0.1889.174      0.111532  11.15%
                        29.0.1795.60       0.072296   7.23%
                        12.17              0.063334   6.33%
                        12.16              0.019319   1.93%
                        30.0.1835.52       0.009162   0.92%
                        29.0.1795.54600    0.008763   0.88%

这有一个包含2个级别的多索引，名称和ga：browserVersion。我想要做的是添加＆＃39;％＆＃39;到0级，看起来像：

Chrome 44.18%

等等

我创建了一个列表，其中包含我想用来替换当前索引的值：

new_index = []
for i in df.index.get_level_values(0):
    i = i+'%'
    new_index.append(i)

然后我尝试将旧索引替换为：

 df.index.get_level_values(0) = new_index

但我明白了：

SyntaxError: can't assign to function call

我知道这对于正常人来说是有效的。只有一个级别的索引。有没有办法用多索引实现这个目标？

Answer 1

# first reset the index , the indices should be converted to columns
df_reset = df.reset_index()

# then concatenate `%` to your column ( this column was an index level 0 )    
df_reset.name = df_reset.name + '%'

# set the index again for your data frame
df_reset.set_index(['name' , 'ga:browserVersion'])

如何修改pandas数据帧多索引的0级？

1 个答案: