生成此错误：TypeError:“NoneType”对象不是subscriptab

Question

当我试图读取文件时，总是出现这个错误。我怎么解决这个问题？在

import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import axes3d
from sklearn.cluster import KMeans


MY_FILE = 'prokaryotes.csv'

df = pd.read_csv("prokaryotes.csv", parse_dates=[0], header=None, 
names=['datetime', 'consumption'])

df['date'] = [x.date() for x in df['datetime']]
df['time'] = [x.time() for x in df['datetime']]



TypeError: 'NoneType' object is not subscriptable

Answer 1

您可以尝试将代码的最后两行替换为：

df['date'] = df.datetime.apply(lambda s : s[:10])
df['time'] = df.datetime.apply(lambda s : s[-9:])
print(df)