Check whether the package is registered on pypi

def package_in_pypi(package):
    """Check whether the package is registered on pypi"""
    url = 'http://pypi.python.org/simple/%s' % package
    try:
        urllib.request.urlopen(url)
        return True
    except urllib.error.HTTPError as e:
        logger.debug("Package not found on pypi: %s", e)
        return False