From kitploit.com
PyShell is Multiplatform Python WebShell. This tool helps you to obtain a shell-like interface on a web server to be remotely accessed. Unlike other webshells, the main goal of the tool is to use as little code as possible on the server side, regardless of the language used or the operating system of the server.
Thanks to this, you can use different types of shells (aspx, php, jsp, sh, py…) both in Windows and Linux, with command history, upload and download files and even, moving through directories as if it were a standard shell.