pd.isna（）

pd.isna（）

检测数组对象缺失值

import numpy as np 
import pandas as pd 
import matplotlib.pyplot as plt
import torch 
from torch import nn 
from torch.utils.data import Dataset,DataLoader,TensorDataset

dftrain_raw = pd.read_csv('./data/titanic/train.csv')
dftest_raw = pd.read_csv('./data/titanic/test.csv')
dftrain_raw.head(10)

dftrain_raw ['Age'][:20]

pd.isna(dftrain_raw ['Age'][:20])

pd.isna(dfdata['Age'][:20]).astype('int32')