NameError: name 'data' is not defined

Question

问题相关代码，请勿粘贴截图

import seaborn as sns
import matplotlib.pyplot as plt
plt.rcParams['font.sans-serif'] = ['SimHei']
plt.rcParams['axes.unicode_minus'] = False
sns.set(font='SimHei')
data['month']=data['日期'].dt.month
data['day']=data['日期'].dt.day
data1=data[['day','3号']]
train_,test_ = train_test_split(data1,test_size=100)
sns.catplot(x='3号',y='day',data=test_)

运行结果及报错内容

Traceback (most recent call last):
  File "D:/pycharm code/分析.py", line 72, in <module>
    data['month']=data['日期'].dt.month
NameError: name 'data' is not defined

我的解答思路和尝试过的方法

请求解决方案

Answer 1

你前面没有初始化和赋值这个变量，所以会报错