我在pandas中的pd.pivot()或pivot_table()函数遇到了一些问题.
我有这个:
df = pd.DataFrame({'site_id': {0: 'a', 1: 'a', 2: 'b', 3: 'b', 4: 'c', 5:
'c',6: 'a', 7: 'a', 8: 'b', 9: 'b', 10: 'c', 11: 'c'},
'dt': {0: 1, 1: 1, 2: 1, 3: 1, 4: 1, 5: 1,6: 2, 7: 2, 8: 2, 9: 2, 10: 2, 11: 2},
'eu': {0: 'FGE', 1: 'WSH', 2: 'FGE', 3: 'WSH', 4: 'FGE', 5: 'WSH',6: 'FGE', 7: 'WSH', 8: 'FGE', 9: 'WSH', 10: 'FGE', 11: 'WSH'},
'kw': {0: '8', 1: …