r">'stderr</span>)</span> <a href="#type-t">t</a></span> <span class="arrow">&#45;&gt;</span></span> string</span></code></div></div><p>What follows are some helper functions which fetch pipes to a running process for interactive reading and writting. They shadow channels with the same names in the standard library. Probably a good reason to only open <code>Subprocess</code> within a limited scope.</p><p>If you try to use one of these functions to access a stream which isn't a pipe, it's a type error.</p><d