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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def _request(method, url, content_type=None, _data=None, user=None, passwd=None):
    '''
    Makes a HTTP request. Returns the JSON parse, or an obj with an error.
    '''
    opener = _build_opener(_HTTPHandler)
    request = _Request(url, data=_data)
    if content_type:
        request.add_header('Content-Type', content_type)
    if user and passwd:
        auth_encode = '{0}:{1}'.format(user, passwd).encode('base64')[:-1]
        auth_basic = "Basic {0}".format(auth_encode)
        request.add_header('Authorization', auth_basic)
        request.add_header('Accept', 'application/json')
    request.get_method = lambda: method
    try:
        handler = opener.open(request)
    except HTTPError as exc:
        return {'error': '{0}'.format(exc)}
    return salt.utils.json.loads(handler.read())