Python中三种表示NA的方式

Python中三种表示NA的方式

# -*- coding: utf-8 -*-
import numpy as np
import pandas as pd

# data_frame = np.load('a.npy',allow_pickle=True)
# print(data_frame.columns)

df = pd.DataFrame({'one' : [1,2,3,pd.NA]})
df = pd.DataFrame({'one' : [1,2,3,np.nan]})
df = pd.DataFrame({'one' : [1,2,3,None]})