FIX accept array-like in feature_names for plot_tree - #27292

from sklearn.datasets import load_breast_cancer
from sklearn.model_selection import train_test_split
from sklearn.tree import DecisionTreeClassifier
from sklearn.tree import plot_tree
import matplotlib.pyplot as plt


cancer = load_breast_cancer()
X_train, X_test, y_train, y_test = train_test_split(cancer.data, cancer.target)
tree = DecisionTreeClassifier(max_depth=1).fit(X_train, y_train)

plot_tree(tree, class_names=cancer.target_names,
          feature_names=cancer.feature_names)
plt.show()