import numpy as np
np.arange(16)
np.arange(16).reshape((4,4))
#快速创建DataFrame
data=DataFrame(np.arange(16).reshape((4,4)),
index=["Ohio","Colorado","Utah","New York"],
columns=["one","two","three","four"])
data
#删除行数据
data.drop(["Colorado","Ohio"])
#删除列
data.drop("two",axis=1)