方法一：（親測可用）
1、打開網址： lookdiv.com
2、在輸入框輸入鑰匙：lookdiv.com
3、點擊“獲取激活碼”按鈕，獲取激活碼
4.激活后可以使用幾個月的時間，到時候再重新激活即可
方法二：永久激活（網上轉載，未嘗試）
1.將下載的JetbrainsCrack-release-enc.jar破解補丁，放到pycharm的bin目錄下
2. 、修改pycharm.exe.vmoptions和pycharm64.exe.vmoptions這倆個文件，在這兩個文件最后追加 ：
-javaagent:C:\ruanjian\pycharm\PyCharm 2018.3.5\bin\JetbrainsCrack-release-enc.jar，最后保存，一定要保存
3.啟動pycharm，默認下一步，到激活頁面，選擇，Activation code后，輸入激活碼：
ThisCrackLicenseId-{ "licenseId":"11011", "licenseeName":"CSDN",
"assigneeName":"csdn", "assigneeEmail":"3113314975", "licenseRestriction":"",
"checkConcurrentUse":false, "products":[ {"code":"II","paidUpTo":"2099-12-31"},
{"code":"DM","paidUpTo":"2099-12-31"}, {"code":"AC","paidUpTo":"2099-12-31"},
{"code":"RS0","paidUpTo":"2099-12-31"}, {"code":"WS","paidUpTo":"2099-12-31"},
{"code":"DPN","paidUpTo":"2099-12-31"}, {"code":"RC","paidUpTo":"2099-12-31"},
{"code":"PS","paidUpTo":"2099-12-31"}, {"code":"DC","paidUpTo":"2099-12-31"},
{"code":"RM","paidUpTo":"2099-12-31"}, {"code":"CL","paidUpTo":"2099-12-31"},
{"code":"PC","paidUpTo":"2099-12-31"} ], "hash":"2911276/0",
"gracePeriodDays":7, "autoProlongated":false}
4.成功激活，有效期至2100年，美滋滋。