1. 修改hosts文件：
添加下面一行到hosts文件，目的是屏蔽掉Pycharm对激活码的验证
**0.0.0.0 account.jetbrains.com **
- windwos系统hosts文件路径为：C:WindowsSystem32driversetc
如果遇到权限问题，可将hosts文件先复制出来修改后再覆盖原来的即可。 - Linux和mac的hosts文件路径为：/etc
在命令行输入
cd /etc
sudo vim hosts
输入密码
i
粘贴**0.0.0.0 account.jetbrains.com**到文件最底部
按esc
输入 :wq 退出修改
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修改后的hosts文件如下：
####2. 打开PyCharm，选择Activate code（用激活码激活）
####3. 复制下载激活码，填入激活码框。
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复制上面的激活码，填入激活码框，点击 OK 进行认证。目前这个激活码有效期至2019年7月29日。