text: # MIT licensed
  # Copyright (c) 2013-2020 lilydjwg <lilydjwg@gmail.com>, et al.
  
  from pkg_resources import parse_version
  
  async def get_version(name, conf, *, cache, **kwargs):
    package = conf.get('pypi') or name
    use_pre_release = conf.get('use_pre_release', False)
  
    url = 'https://pypi.org/pypi/{}/json'.format(package)
  
    data = await cache.get_json(url)
  
    if use_pre_release:
      version = sorted(
        data['releases'].keys(),
        key = parse_version,
      )[-1]
    else:
      version = data['info']['version']
    return version
  