具有多个联接列的Python合并联接
我有两张表,结构如下:具有多个联接列的Python合并联接,python,pandas,dataframe,merge,Python,Pandas,Dataframe,Merge,我有两张表,结构如下: Table 1 ID City Country 1 India 2 Delhi 3 America 4 New York 5 Germany Table 2 ID Country City 1 India 2 India Delhi 3 America 4 America New York 5 Germany Select * from table1
Table 1
ID City Country
1 India
2 Delhi
3 America
4 New York
5 Germany
Table 2
ID Country City
1 India
2 India Delhi
3 America
4 America New York
5 Germany
Select * from table1
Left outer join table2
on citycountry = city or citycountry = country
我的任务是针对多个加入条件在pandas中实现相同的功能
“citycountry=city或citycountry=country”
。我应该如何在pandas中执行此操作?一旦您将数据存储为,就可以使用pandas的功能:
import pandas as pd
pd.merge(table1, table2,
left_on= ['citycountry', 'citycountry'],
right_on= ['country', 'city'],
how = 'left')