How to use "while" within the command in -c option of python?

[Jussi Piitulainen]

Chris Angelico writes:

> Here's a side challenge. In any shell you like, start with this
> failing statement, and then fix it without retyping anything:
> 
> sikorsky at sikorsky:~$ python -c "a=1; if a: print(a)"
>   File "<string>", line 1
>     a=1; if a: print(a)
>           ^
> SyntaxError: invalid syntax
> 
> In bash, I was unable to insert a newline into the quoted string. My
> only option was to backspace everything after the point where I
> wanted the newline, then hit enter, then retype the if. I'm curious
> to know if that's simply because I didn't think of (some bash
> feature), or alternatively, if there's another shell that would have
> made this easy.

C-v C-j inserts a newline for me, in bash.