Python 逆变换法（LabelEncoder）

你可以在下面找到我在互联网上找到的代码来构建一个简单的神经网络。一切都很好，但当我对y标签进行编码时，我得到的预测给出了以下结果：

2 0 1 2 1 2 0 2 1 0 0 1 1 1 1 1 1 2 1 0 1 0 2

所以现在我需要把它转换回原来的flower类Iris virginica，等等。我需要使用逆_变换方法，但是你能帮忙吗

import pandas as pd
from sklearn import preprocessing
from sklearn.model_selection import train_test_split
from sklearn.neural_network import MLPClassifier
from sklearn.metrics import classification_report, confusion_matrix 


# Location of dataset
url = "https://archive.ics.uci.edu/ml/machine-learning-databases/iris/iris.data"

# Assign colum names to the dataset
names = ['sepal-length', 'sepal-width', 'petal-length', 'petal-width', 'Class']

# Read dataset to pandas dataframe
irisdata = pd.read_csv(url, names=names)  

irisdata.head()
#head_tableau=irisdata.head()
#print(head_tableau)

# Assign data from first four columns to X variable
X = irisdata.iloc[:, 0:4]

# Assign data from first fifth columns to y variable
y = irisdata.select_dtypes(include=[object])  

y.head()
#afficher_y=y.head()
#print(afficher_y)

y.Class.unique()
#affiche=y.Class.unique()
#print(affiche)

le = preprocessing.LabelEncoder()

y = y.apply(le.fit_transform)  

X_train, X_test, y_train, y_test = train_test_split(X, y, test_size = 0.20)

mlp = MLPClassifier(hidden_layer_sizes=(10, 10, 10), max_iter=1000)  
mlp.fit(X_train, y_train.values.ravel())

predictions = mlp.predict(X_test)
print(predictions)

---

你走在正确的轨道上：

In [7]: le.inverse_transform(predictions[:5])
Out[7]: 
array(['Iris-virginica', 'Iris-setosa', 'Iris-setosa', 'Iris-versicolor',
       'Iris-virginica'], dtype=object)

---

你走在正确的轨道上：

In [7]: le.inverse_transform(predictions[:5])
Out[7]: 
array(['Iris-virginica', 'Iris-setosa', 'Iris-setosa', 'Iris-versicolor',
       'Iris-virginica'], dtype=object)