我正在尝试在数据集上使用 xgboost。我在各种博客中看到了相同的语法,但在调用 clf.evals_result() 时出现错误,这是我的代码
from xgboost import XGBRegressor as xgb
from sklearn.metrics import mean_absolute_error as mae
evals_result ={}
eval_s = [(x, y),(xval,yval)]
clf = xgb(n_estimators=100,learning_rate=0.03,tree_method='gpu_hist',lamda=0.1,eval_metric='mae',eval_set=eval_s,early_stopping_rounds=0,evals_result=evals_result)
clf.fit(x,y)
r = clf.evals_result()
Run Code Online (Sandbox Code Playgroud)
这是我收到的错误
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
<ipython-input-138-2d6867968043> in <module>
1
----> 2 r = clf.evals_result()
3
4 p = clf.predict(xval)
/opt/conda/lib/python3.6/site-packages/xgboost/sklearn.py in evals_result(self)
399 'validation_1': {'logloss': ['0.41965', '0.17686']}}
400 """
--> 401 if self.evals_result_:
402 evals_result = self.evals_result_
403 else:
AttributeError: 'XGBRegressor' object has no attribute 'evals_result_'
Run Code Online (Sandbox Code Playgroud) 我有下面的类和其中定义的功能。
class utils:
def pass_hash(unhashed):
hashed = hashlib.sha256(unhashed)
hashed = hashed.hexdigest()
return hashed
Run Code Online (Sandbox Code Playgroud)
当我打电话
print(utils.pass_hash('abc'.encode()))
Run Code Online (Sandbox Code Playgroud)
它工作正常,但如果我打电话
obj = utils()
print(obj.pass_hash('abc'.encode()))
Run Code Online (Sandbox Code Playgroud)
它给出以下错误:
print(obj.pass_hash('abc'.encode()))
TypeError: pass_hash() takes 1 positional argument but 2 were given
Run Code Online (Sandbox Code Playgroud)
而如果我在函数中传递自变量,则这种行为会逆转,即它可以很好地与对象配合使用,但是在访问时像utils.pass_hash()一样会给出错误。
有人可以解释一下这种行为吗?