今日代码出错 No module named 'matplotlib' 与 No module named 'pip'与WARNING: Ignoring invalid distribution -ip (d:\python\lib\site-packages)


解决方法：
第一步（WARNING: Ignoring invalid distribution -ip (d:\python\lib\site-packages)）
https://blog.csdn.net/weixin_43139128/article/details/120174643

第二步（ No module named 'pip'）
https://blog.csdn.net/a1007720052/article/details/81906460 或
https://blog.csdn.net/weixin_42551921/article/details/120017500?spm=1001.2101.3001.6650.1&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7EPayColumn-1.pc_relevant_paycolumn_v3&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7ECTRLIST%7EPayColumn-1.pc_relevant_paycolumn_v3&utm_relevant_index=2

第三步（No module named 'matplotlib'）
https://blog.csdn.net/zhaluo0051/article/details/78239417 或
https://blog.csdn.net/qq_34732729/article/details/104008585