In GroupKFold in ScikitLearn error message: ValueError: too many values to unpack (expected 2)
In GroupKFold in ScikitLearn error message: ValueError: too many values to unpack (expected 2)
在使用 scikit-learn 中的 GroupKFold 方法时,我收到一条错误消息,根据文档我无法理解。
错误信息是:
ValueError: too many values to unpack (expected 2)
文档指出:
对于可重现的示例:
from sklearn.model_selection import GroupKFold
X1 = np.random.randint(1, 10, size = (100, 2))
groups1 = np.random.choice([1,2,3, 4, 5], size = 100, p = [.15, .2, .3, .15, .2])
gkf1 = GroupKFold(5)
train, test = gkf1.split(X = X1, groups = groups1 )
这会产生以下错误消息:
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-56-911681dea183> in <module>
8 gkf1 = GroupKFold(5)
9
---> 10 train, test = gkf1.split(X = X1, groups = groups1 )
ValueError: too many values to unpack (expected 2)
split
函数returns一个生成器。
您将不得不遍历生成器以获得训练组和测试组。
如示例所示
for train_index, test_index in gkf1.split(X, y, groups):
在使用 scikit-learn 中的 GroupKFold 方法时,我收到一条错误消息,根据文档我无法理解。
错误信息是:
ValueError: too many values to unpack (expected 2)
文档指出:
对于可重现的示例:
from sklearn.model_selection import GroupKFold
X1 = np.random.randint(1, 10, size = (100, 2))
groups1 = np.random.choice([1,2,3, 4, 5], size = 100, p = [.15, .2, .3, .15, .2])
gkf1 = GroupKFold(5)
train, test = gkf1.split(X = X1, groups = groups1 )
这会产生以下错误消息:
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
<ipython-input-56-911681dea183> in <module>
8 gkf1 = GroupKFold(5)
9
---> 10 train, test = gkf1.split(X = X1, groups = groups1 )
ValueError: too many values to unpack (expected 2)
split
函数returns一个生成器。
您将不得不遍历生成器以获得训练组和测试组。
如示例所示
for train_index, test_index in gkf1.split(X, y, groups):