如何使用for循环创建元组列表

Question

我已经用test_score填充了results，但是我如何将train_score添加到results，以便它是一个包含10个元组的列表，例如:(train_score,test_score)?

import numpy as np
import pandas as pd
from sklearn import tree
from sklearn.tree import DecisionTreeClassifier
results = []
for i in list(range(1, 11)):

clf = DecisionTreeClassifier(max_depth = i, random_state=0).fit(X_train, y_train)

test_score = clf.score(X_test, y_test)
train_score = clf.score(X_train, y_train)

results.append(test_score)

results

Answer 1

你可以这样做:

...
results.append((train_score, test_score))
...

Answer 2

将元组添加到列表中:
results.append((train_score,test_score))

另外，请注意for i in list(range(1, 11))在for循环中是不必要的。

for i in range(1, 11)是足够的，因为它返回一个可迭代的范围对象。

Answer 3

在

之前创建一个元组实例

t = (test_score, train_score)
results.append(t)