How to send a var to stdin of an external software

[Bryan Olson]

I wrote:
> [...] Pipe loops are tricky business.
> 
> Popular solutions are to make either the input or output stream
> a disk file, or to create another thread (or process) to be an
> active reader or writer.

Or asynchronous I/O. On Unix-like systems, you can select() on
the underlying file descriptors. (MS-Windows async mechanisms are
not as well exposed by the Python standard library.)


-- 
--Bryan