IntelliJ IDEA: Can't type { and [

It worked for me by going to Ctrl+Shift+A (actions) -> Registry... and then disabling "actionSystem.force.alt.gr"

Worked for me: While focus is on PyCharm then Ctrl+Shift+A (actions) -> Registry... and then enabling "actionSystem.force.alt.gr"

There are related issues on YouTrack: https://youtrack.jetbrains.com/issue/IDEA-177327, https://youtrack.jetbrains.com/issue/IDEA-91975 Problem should be fixed in IDEA 2018.3. By the way, you could try to add "actionSystem.force.alt.gr=true" option using "Help | Edit Custom Properties"