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秦瀚诧异道：板栗哥哥这话说的，怎么会把针当剑使呢？板栗自知失言，慌忙道：我就是打个比方。During the installation process, if there is no Pip, Python needs to be installed first and then Pip needs to be installed. The process is as shown in the figure:故事讲述的是小主人公罗小布将自己的快乐卖给了忧愁国的收购员毛卷卷，以换取每次考试的100分、每次玩游戏都赢和每天两个不同口味的冰激凌。可是他发现失去快乐，拥有再多的愿望也无济于事。于是，罗小布让毛卷卷把自己变小，和新认识的小伙伴月亮狗一起，踏上了寻找快乐的艰辛旅程。在寻找快乐的过程中结识三个活泼快乐精灵，最终一起打败忧愁国疙瘩王！罗小布也真正明白了快乐的含义，知道快乐是多么的重要！(to be continued)Sex: FemaleIn web development, Picture preloading is a common technique, If you set the src attribute directly to the img tag node, If the picture is larger, Or if the network speed is relatively slow, Before the picture is loaded, The picture will be a blank scene for a period of time. This is not good for the user experience, so at this time we can use a loading loading picture as a placeholder to prompt the user that the picture is being loaded before the picture is loaded. After the picture is loaded, we can directly assign a value to the picture. The following code is as follows when we do not use proxy mode to preload pictures: