"To execute file with sublimerepl go to Tools > SublimeREPL > Python > Python RUN current file

or create new build:

Tools > Build System > New build system

enter:

{
"target": "run_existing_window_command",
"id": "repl_python_run",
"file": "config/Python/Main.sublime-menu"
}

You can now change your build system to whatever you named it when saving and pressing CTRL + B will execute the current file in SublimeREPL tab with stdin working."