使用gridsearchcv时出现类型错误?

我在试着调音 n_estimators 属于 RandomForestClassifier 使用 GridSearchCV . 但我收到输入错误-> TypeError: get_params() missing 1 required positional argument: 'self'

代码:

from sklearn.grid_search import GridSearchCV
from sklearn.ensemble import RandomForestClassifier

n_trees = list(range(10,110,10))
print(n_trees)

[10, 20, 30, 40, 50, 60, 70, 80, 90, 100]

param_grid = dict(n_estimators=n_trees)
print(param_grid)

{'n_estimators': [10, 20, 30, 40, 50, 60, 70, 80, 90, 100]}

grid = GridSearchCV(RandomForestClassifier, param_grid, cv=5, scoring='roc_auc')


grid.fit(X,y)   <--- Getting error at this cell