我希望能够在运行时将GridSearchCV输出保存到文件。
GridSearchCV(XGBClassifier(), tuned_parameters, cv=cv, n_jobs=-1, verbose=10)
这是一个输出示例:
Fitting 1 folds for each of 200 candidates, totalling 200 fits
[Parallel(n_jobs=-1)]: Using backend with 4 concurrent workers.
[CV] colsample_bytree=0.7, learning_rate=0.05, max_depth=4, n_estimators=300, subsample=0.7
[CV] colsample_bytree=0.7, learning_rate=0.05, max_depth=4, n_estimators=300, subsample=0.7
score=0.645, total= 6.3min
[Parallel(n_jobs=-1)]: Done 1 tasks | elapsed: 6.3min
我设法保存了第一行和平行行,但无论我尝试什么,我都无法保存以[CV]开头的行。我想保存这些行,这样如果程序失败,我至少可以看到部分结果。
我尝试了的解决方案
sys.stdout = open('file', 'w')
和:
with open('help.txt', 'w') as f:
with redirect_stdout(f):
print('it now prints to `help.text`')
这个解决方案(也指这个解决方案(也不起作用:
class Tee(object):
def __init__(self, *files):
self.files = files
def write(self, obj):
for f in self.files:
f.write(obj)
f.flush() # If you want the output to be visible immediately
def flush(self) :
for f in self.files:
f.flush()
并尝试了作者所说的猴子补丁,但也只是保存了"平行的";线
(只是强调一下,上面的代码只是所提出的解决方案的一部分,当我尝试它们时,我采用了所有相关的代码(。
是否有保存ALL输出的方法?
我不知道您是否可以使用sys
库或其他库来实现这一点。相反,我建议使用以下方法来正确重定向stdout和stderr。
假设你有一个这样的脚本:
测试.py
import numpy as np
from sklearn.model_selection import GridSearchCV
from sklearn.linear_model import LogisticRegression
model = LogisticRegression()
params = {"C": [0.001, 0.01, 0.1, 1, 2, 3]}
grid = GridSearchCV(model, params, n_jobs=-1, verbose=10)
X = np.random.randn(100, 10)
y = np.random.randint(0, 2, 100)
grid.fit(X, y)
然后用运行
python test.py > logfile.txt 2>&1
那么你将同时拥有";平行的";以及";CV";logfile.txt
:中的行
Fitting 5 folds for each of 6 candidates, totalling 30 fits
[Parallel(n_jobs=-1)]: Using backend LokyBackend with 12 concurrent workers.
[Parallel(n_jobs=-1)]: Done 1 tasks | elapsed: 1.6s
[Parallel(n_jobs=-1)]: Done 11 out of 30 | elapsed: 1.7s remaining: 2.9s
[Parallel(n_jobs=-1)]: Done 15 out of 30 | elapsed: 1.7s remaining: 1.7s
[Parallel(n_jobs=-1)]: Done 19 out of 30 | elapsed: 1.7s remaining: 1.0s
[Parallel(n_jobs=-1)]: Done 23 out of 30 | elapsed: 1.7s remaining: 0.5s
[Parallel(n_jobs=-1)]: Done 27 out of 30 | elapsed: 1.7s remaining: 0.2s
[Parallel(n_jobs=-1)]: Done 30 out of 30 | elapsed: 1.7s finished
[CV] C=0.001 .........................................................
[CV] ............................. C=0.001, score=0.500, total= 0.0s
[CV] C=0.1 ...........................................................
[CV] ............................... C=0.1, score=0.450, total= 0.0s
[CV] C=0.1 ...........................................................
[CV] ............................... C=0.1, score=0.550, total= 0.0s
[CV] C=1 .............................................................
[CV] ................................. C=1, score=0.550, total= 0.0s
[CV] C=1 .............................................................
[CV] ................................. C=1, score=0.500, total= 0.0s
[CV] C=2 .............................................................
...
详细信息
";[CV]";行由print
语句生成(来源(。这是写入stdout的。
并且";平行的";行由记录器(Source(生成。这是写入stderr的。
> logfile.txt 2>&1
是将stdout和stderr重定向到同一个文件的技巧(相关问题(。因此,两条消息都被写入同一个文件。