修改hosts文件
将0.0.0.0 account.jetbrains.com添加到hosts文件最后，注意hosts文件无后缀，如果遇到无法修改或权限问题，可以采用覆盖的方法去替换hosts文件
修改后请检查hosts文件是否修改，激活码无法激活的原因99.99%是因为hosts没有修改正确
Windows系统hosts文件路径为：c:\windows\system32\drivers\etc
Mac和Ubantu(Linux)系统hosts文件路径为：/etc
复制激活码
打开PyCharm选择Activation code激活，然后复制下面的激活码点击激活。此激活码有效期为2019-05-04
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