如何解码pandas dataframe中LabelEncoder实现的列？

from sklearn.preprocessing import LabelEncoder
import pandas as pd

# 创建一个示例DataFrame
df = pd.DataFrame({'fruit': ['apple', 'banana', 'orange', 'banana']})

# 实例化LabelEncoder对象并进行编码
encoder = LabelEncoder()
df['encoded_fruit'] = encoder.fit_transform(df['fruit'])

# 解码LabelEncoder列
df['decoded_fruit'] = encoder.inverse_transform(df['encoded_fruit'])

# 打印解码后的DataFrame
print(df)

    fruit  encoded_fruit  decoded_fruit
0   apple              0          apple
1  banana              1         banana
2  orange              2         orange
3  banana              1         banana