title: Does the Python regular expression module use BRE or ERE?
body: <p>It appears that POSIX splits regular expression implementations into two kinds: Basic Regular Expressions (BRE) and Extended Regular Expressions (ERE).</p>
  
  <p>Python <a href="https://docs.python.org/3.4/library/re.html" rel="noreferrer"><code>re</code> module</a> reference does not seem to specify.</p>