关于#python#数据挖掘出现NameError: name 'df' is not defined的问题，如何解决？

Question

python初学者，在运行以下代码时出现问题
pandas模块已经安装

import pandas as pd
import numpy as np
import matplotlib.pyplot as plt
%matplotlib inline
import seaborn as sns
import matplotlib as mpl
mpl.rcParams['font.sans-serif'] = [u'SimHei']
mpl.rcParams['axes.unicode_minus'] = False
import warnings
warnings.filterwarnings("ignore")

df = pd.read_csv(r"D:\CSV\KEHU_CESHI.csv")

报错如下

df[0,1]
PyDev console: starting.
Traceback (most recent call last):
  File "D:\pycharm\PyCharm Community Edition 2022.2.2\plugins\python-ce\helpers\pydev\_pydevd_bundle\pydevd_exec2.py", line 3, in Exec
    exec(exp, global_vars, local_vars)
  File "<input>", line 1, in <module>
NameError: name 'df' is not defined

该问题如何解决

Answer 1

你的代码没有问题，最后加上你想看的第几行数据就行了 ，这样运行之后就会直接输出结果，你在命令行再输入
df[0,1]系统是不知道df的，所以报错"NameError: name 'df' is not defined