从另一个数据框中查找匹配元素和 return 其 id- python
Look up the matching element from another data frame and return its id- python
我有一个订单数据框:
items
chat_id
curd,vada,rice
74374374h4473
idly,sambar
7949759459h34
我有另一个独特的菜单项数据框,它有自己的特定 ID:
id
items
1
idly
2
vada
3
rice
4
curd
5
sambar
现在我想通过在订单数据框中打印其 chat_id 来匹配元素和 return 它的 ID
chat_id
id
74374374h4473
4
74374374h4473
2
74374374h4473
3
7949759459h34
1
7949759459h34
5
你有数据框吗df_orders
:
items chat_id
0 curd,vada,rice 74374374h4473
1 idly,sambar 7949759459h34
和数据框 df_menu
:
id items
0 1 idly
1 2 vada
2 3 rice
3 4 curd
4 5 sambar
然后:
df_orders["items"] = df_orders["items"].str.split(",")
df_orders = df_orders.explode("items")
print(df_orders.merge(df_menu, on="items")[["chat_id", "id"]])
打印:
chat_id id
0 74374374h4473 4
1 74374374h4473 2
2 74374374h4473 3
3 7949759459h34 1
4 7949759459h34 5
我有一个订单数据框:
items | chat_id |
---|---|
curd,vada,rice | 74374374h4473 |
idly,sambar | 7949759459h34 |
我有另一个独特的菜单项数据框,它有自己的特定 ID:
id | items |
---|---|
1 | idly |
2 | vada |
3 | rice |
4 | curd |
5 | sambar |
现在我想通过在订单数据框中打印其 chat_id 来匹配元素和 return 它的 ID
chat_id | id |
---|---|
74374374h4473 | 4 |
74374374h4473 | 2 |
74374374h4473 | 3 |
7949759459h34 | 1 |
7949759459h34 | 5 |
你有数据框吗df_orders
:
items chat_id
0 curd,vada,rice 74374374h4473
1 idly,sambar 7949759459h34
和数据框 df_menu
:
id items
0 1 idly
1 2 vada
2 3 rice
3 4 curd
4 5 sambar
然后:
df_orders["items"] = df_orders["items"].str.split(",")
df_orders = df_orders.explode("items")
print(df_orders.merge(df_menu, on="items")[["chat_id", "id"]])
打印:
chat_id id
0 74374374h4473 4
1 74374374h4473 2
2 74374374h4473 3
3 7949759459h34 1
4 7949759459h34 5