python_csv中判断空

import numpy as np
import pandas as pd

path_csv = "rewrites.csv" #这里面有空着的需要提出来
data_rewrites = pd.read_csv(path_csv)
# print(data_rewrites["rewrite"].values[0])


error_numb = []
for i in range(3463):
    #可以打印不成功的
    if  not isinstance(data_rewrites["rewrite"].values[i],str):
        error_numb.append(i)
print(error_numb)