Python可以使用raw_input接受Ctrl + [char]吗？

Question

I am writing a command line interface in python that accepts a lot of user input. For the values that I am querying the user about, there is a significant amount of "additional information" that I could display, but would rather only display if the user needed help with how to provide a value.

So I thought I would provide my usual raw_input prompt, but also try an accept some Ctrl-H type sequences to output this help info.

Can Python accept this kind of input via raw_input in a terminal/shell? It there another more proper way to do this (preferably in the stdlib)?

Answer 1

No, python cannot accept this kind of input through raw_input . This is because you're thinking about sequences like: Ctrl-C , Ctrl-Z , etc. These are not keyboard inputs, these are signals that are processed by the terminal (not the program).

You can try to set up signal handlers that will do this for you, but that is not a very reliable solution (regardless of whether you're using python or something else).

The best solution for accepting this kind of input is to either use curses , or use readline (with adjustments to the configuration to handle things like Ctrl-H ). Using readline will make your life much easier, but it comes with the cost that you have to license your program under the GNU GPL (or similar). Whereas curses does not have this kind of restriction.