AttributeError：“ dict”对象没有属性“ sort_values”

Question

代码在下面

我正在使用python 3.5版

# train a random forest classifier
rf = RandomForestClassifier(n_estimators = 100, random_state = 42)
rf.fit(X_train, y_train)

# show feature importance
feature_importances_df = pd.DataFrame({"feature": features, "importance": rf.feature_importances_}).sort_values("importance", ascending = False)
feature_importances_df.head(20)

尝试

feature_importances = {"feature": features, "importance": rf.feature_importances_}.sort_values("importance", ascending = False)
feature_importances_df = pd.DataFrame.from_dict(feature_importances, orient='index')

我正在尝试学习情感分析。被错误卡住

AttributeError: 'dict' object has no attribute 'sort_values'

Answer 1

我正在使用Python 3.6.8和pandas 0.25.1

尝试

dictionary = {"a":[2,3,1,4],"b":["a","f","g","z"]}
dataFrame = pd.DataFrame.from_dict(dictionary)
dataFrame.sort_values('a',ascending=False,inplace = True)
dataFrame.reset_index(drop=True)

这将打印

   a  b
0  4  z
1  3  f
2  2  a
3  1  g

希望有帮助！