Python 属性错误：'；AxesSubplot'；对象没有属性'；nLAGEST'；

此错误是什么意思：AttributeError:'AxeSubplot'对象没有属性'NLAGEST'意味着什么？

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt

df = pd.read_csv('persons-arrested-for-selected-major-offences-by-age-group.csv', index_col="level_1")
df2 = df.dropna()

df_year = df2[df2['year']==2018]
df_age = df_year[df_year['level_2']=='21 Years Old And Below']

df_offences = df_age.drop_duplicates().sort_values('level_1', ascending=False)
df_offences.plot.bar(figsize = (15,6)).nlargest(3,['level_1','value'])
plt.show()

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我试图展示犯罪中的前三个值，那么你应该做

dfu offenses.nlagest（…）.plot.bar（…）

？