Python 使用df列中的值从另一个df中查找名称

我有2个数据帧

import pandas as pd

data1 = {"name": ["a","b","c","d","e"], "value": [0.01,0.02,0.03,0.04,0.05]}

df1 = pd.DataFrame (data1, columns = ['name', 'value'])

data2 = {"value": [0.01,0.03,0.05]}

df2 = pd.DataFrame (data2, columns = ['value'])

我想使用df2中的值从df1中查找其对应的名称，并将其添加为新列。i、 e.以该df结束：

data3 = {"value": [0.01,0.03,0.05], "name": ["a","c","e"]}

df3 = pd.DataFrame (data3, columns = ['value', 'name'])

给你：

print（df2.merge（df1，on='value'））

输出：

   value name
0   0.01    a
1   0.03    c
2   0.05    e

你可以在这里使用它作为遮罩

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这回答了你的问题吗？

df1[df1['value'].isin(df2['value'])]

  name  value
0    a   0.01
2    c   0.03
4    e   0.05