python-AttributeError: module 'matplotlib' has no attribute 'contourf'

错误内容

Traceback (most recent call last):
  File "C:/Users/雪山飞狐/Desktop/学习总结/ML100天/Code/Day_4.py", line 30, in <module>
    plt.contourf(X1, X2, classifer.predict(np.array([X1.ravel(), X2.ravel()]).T).reshape(X1.shape),
AttributeError: module 'matplotlib' has no attribute 'contourf'

解决方案

（1）重装

pip uninstall matplotlib
pip install matplotlib

（2）改变导入方式

import matplotlib as plt

改为

from matplotlib import pyplot as plt