pycharm激活方法：
今天更新了一下pycharm，结果之前的激活就不能用了，下面是激活方法；
1、mac下在终端进入etc目录；
cd /etc
2、编辑hosts文件；
vi hosts
将“0.0.0.0 account.jetbrains.com”添加到hosts文件中
3、打开PyCharm，选择 Activate code（用激活码激活）
4、复制激活码，填入激活码框
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