回答編集履歴
1
test
CHANGED
|
@@ -1,5 +1,5 @@
|
|
|
1
1
|
```python
|
|
2
|
-
df['worker_lag'] = df.
|
|
2
|
+
df['worker_lag'] = df['date'].map(df.groupby('date').first().shift()['worker'])
|
|
3
3
|
print(df)
|
|
4
4
|
```
|
|
5
5
|
|