Python总结:RuntimeError: matplotlib does not support generators as input

深碍√TFBOYSˉ_ 2021-11-24 00:30 384阅读 0赞

# **QUESTION:RuntimeError: matplotlib does not support generators as input?** #

# ANSWER: #

**例子:**

来源:stackoverflow:[question][]

**在运行github上的一个例子时，[https://github.com/vsmolyakov/experiments\_with\_python/blob/master/chp01/ensemble\_methods.ipynb][https_github.com_vsmolyakov_experiments_with_python_blob_master_chp01_ensemble_methods.ipynb]，**

**进行代码检测，报错了使用Python3.x版本。**

plt.figure()
    (_, caps, _) = plt.errorbar(num_est, bg_clf_cv_mean, yerr=bg_clf_cv_std, c='blue', fmt='-o', capsize=5)
    for cap in caps:
        cap.set_markeredgewidth(1)                                                                                                                                
    plt.ylabel('Accuracy'); plt.xlabel('Ensemble Size'); plt.title('Bagging Tree Ensemble');
    plt.show()

**实际上在这个例子中，有一行num\_est = map(int, np.linspace(1,100,20))，这个在Python的2.7版本中产生的是一个List,而在Python3.x中产生的是一个Generators，所有建议把这一个替换成:**

num_est = np.linspace(1,100,20).astype(int)

[question]: https://stackoverflow.com/questions/53862456/matplotlib-does-not-support-generators-as-input
[https_github.com_vsmolyakov_experiments_with_python_blob_master_chp01_ensemble_methods.ipynb]: https://github.com/vsmolyakov/experiments_with_python/blob/master/chp01/ensemble_methods.ipynb