Generating a 'X','Y' string from an array for an IN query with as little code as possible in Python and PHP. This is done as a learning exercise for me to see how list comprehensions work, being used for some random Twitter "your friends signed up" worker.

example.php

<?php
$users = [['id' => 1, 'name' => 'Jack'], ['id' => 2, 'name' => 'Jill']];

echo implode(',', array_map(function($u) { return "'{$u['id']}'"; }, $users));

example.py

users = [{'id': 1, 'name': 'Jack'}, {'id': 2, 'name': 'Jill'}];

print ','.join(["'{0}'".format(u['id']) for u in users])