pypi.py 文件源码

def package_existent(name):
    """search package.

    * :class:`bootstrap_py.exceptions.Conflict` exception occurs
      when user specified name has already existed.

    * :class:`bootstrap_py.exceptions.BackendFailure` exception occurs
      when PyPI service is down.

    :param str name: package name
    """
    if sys.version_info < (3, 0):
        try:
            result = search_package(name)
        except (socket.error,
                xmlrpc_client.ProtocolError) as exc:
            raise BackendFailure(exc)
    else:
        try:
            result = search_package(name)
        except (socket.gaierror,
                TimeoutError,
                ConnectionRefusedError,
                xmlrpc_client.ProtocolError) as exc:
            raise BackendFailure(exc)
    if result:
        msg = ('[error] "{0}" is registered already in PyPI.\n'
               '\tSpecify another package name.').format(name)
        raise Conflict(msg)