我想绘制2个变量。一个是分类的，另一个是数值。
gender race/ethnicity parental level of education lunch test preparation course math score reading score writing score
108 Female Group B Associate'S Degree Free/Reduced None 52 76 70
231 Male Group C Associate'S Degree Standard None 46 43 42
764 Male Group D Some College Standard None 60 63 59
0 Female Group B Bachelor'S Degree Standard None 72 72 74
885 Female Group C Associate'S Degree Standard Completed 62 76 80
419 Male Group E High School Free/Reduced Completed 57 56 54
df.info()
<class 'pandas.core.frame.DataFrame'>
RangeIndex: 1000 entries, 0 to 999
Data columns (total 8 columns):
gender 1000 non-null object
race/ethnicity 1000 non-null category
parental level of education 1000 non-null category
lunch 1000 non-null object
test preparation course 1000 non-null object
math score 1000 non-null int64
reading score 1000 non-null int64
writing score 1000 non-null int64
dtypes: category(2), int64(3), object(3)
memory usage: 49.3+ KB
plt.hist(data=df, x="education",y="math score")
output error:
"AttributeError: 'NoneType' object has no attribute 'update'
有人知道我做错了吗？