摘要: 1 import pandas as pd 2 import numpy as np 3 4 s = pd.Series(['A', 'b', 'c', 'bbhello', '123', np.nan, 'hj']) 5 df = pd.DataFrame({'key1': list('abcde 阅读全文
posted @ 2019-05-02 20:46 xsan 阅读(513) 评论(0) 推荐(0) 编辑