import pandas as pd import numpy as np
使用from_tuples:
np.random.seed(0) tuples = list(zip(*[['bar', 'bar', 'baz', 'baz', 'foo', 'foo', 'qux', 'qux'], ['one', 'two', 'one', 'two', 'one', 'two', 'one', 'two']])) idx = pd.MultiIndex.from_tuples(tuples, names=['first', 'second'])
使用from_product:
idx = pd.MultiIndex.from_product([['bar', 'baz', 'foo', 'qux'],['one','two']])
然后,使用此MultiIndex:
df = pd.DataFrame(np.random.randn(8, 2), index=idx, columns=['A', 'B']) print (df) A B first second bar one 1.764052 0.400157 two 0.978738 2.240893 baz one 1.867558 -0.977278 two 0.950088 -0.151357 foo one -0.103219 0.410599 two 0.144044 1.454274 qux one 0.761038 0.121675 two 0.443863 0.333674