在自己代码中引用robotframe中的Selenium2Library问题

haiyang_it

我想在自己的代码中使用Selenium2Library库中的类，例如打开浏览器：

代码如下：

from Tkinter import *
import Selenium2Library

class Linghy_Library:
    def Utility_Open_Window(self,url):
        browser = Selenium2Library._BrowserManagementKeywords()
        browser.open_browser(url,"ie")

但是这个报错，看标红部分：
File "<string>", line 2, in open_browser
  File "C:\Python27\lib\site-packages\robotframework_selenium2library-1.4.0-py2.7.egg\Selenium2Library\keywords\keywordgroup.py", line 12, in _run_on_failure_decorator
    return method(*args, **kwargs)
  File "C:\Python27\lib\site-packages\robotframework_selenium2library-1.4.0-py2.7.egg\Selenium2Library\keywords\_browsermanagement.py", line 109, in open_browser
    self._info("Opening browser '%s' to base url '%s'" % (browser, url))
AttributeError: '_BrowserManagementKeywords' object has no attribute '_info'


_BrowserManagementKeywords所在的源码如下：

import os
import robot
from robot.errors import DataError
from selenium import webdriver
from Selenium2Library import webdrivermonkeypatches
from Selenium2Library.utils import BrowserCache
from Selenium2Library.locators import WindowManager
from keywordgroup import KeywordGroup

ROOT_DIR = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))
FIREFOX_PROFILE_DIR = os.path.join(ROOT_DIR, 'resources', 'firefoxprofile')
BROWSER_NAMES = {'ff': "_make_ff",
                 'firefox': "_make_ff",
                 'ie': "_make_ie",
                 'internetexplorer': "_make_ie",
                 'googlechrome': "_make_chrome",
                 'gc': "_make_chrome",
                 'chrome': "_make_chrome",
                 'opera' : "_make_opera",
                 'phantomjs' : "_make_phantomjs",
                 'htmlunit' : "_make_htmlunit",
                 'htmlunitwithjs' : "_make_htmlunitwithjs",
                 'android': "_make_android",
                 'iphone': "_make_iphone"
                }

class _BrowserManagementKeywords(KeywordGroup):

    def __init__(self):
        self._cache = BrowserCache()
        self._window_manager = WindowManager()
        self._speed_in_secs = float(0)
        self._timeout_in_secs = float(5)
        self._implicit_wait_in_secs = float(0)
    def open_browser(self, url, browser='firefox', alias=None,remote_url=False,
                desired_capabilities=None,ff_profile_dir=None):
        if remote_url:
            self._info("Opening browser '%s' to base url '%s' through remote server at '%s'"
                    % (browser, url, remote_url))
        else:
            self._info("Opening browser '%s' to base url '%s'" % (browser, url))
        browser_name = browser
        browser = self._make_browser(browser_name,desired_capabilities,ff_profile_dir,remote_url)
        browser.get(url)
        self._debug('Opened browser with session id %s'
                    % browser.session_id)
        return self._cache.register(browser, alias)

类KeywordGroup源码如下：
import sys
import inspect
try:
    from decorator import decorator
except SyntaxError: # decorator module requires Python/Jython 2.4+
    decorator = None
if sys.platform == 'cli':
    decorator = None # decorator module doesn't work with IronPython 2.6

def _run_on_failure_decorator(method, *args, **kwargs):
    try:
        return method(*args, **kwargs)
    except Exception, err:
        self = args[0]
        if hasattr(self, '_run_on_failure'):
            self._run_on_failure()
        raise

class KeywordGroupMetaClass(type):
    def __new__(cls, clsname, bases, dict):
        if decorator:
            for name, method in dict.items():
                if not name.startswith('_') and inspect.isroutine(method):
                    dict[name] = decorator(_run_on_failure_decorator, method)
        return type.__new__(cls, clsname, bases, dict)

class KeywordGroup(object):
    __metaclass__ = KeywordGroupMetaClass

看源代码中貌似是没有_info属性的。
但是为什么在RIDE中运行openbrowser的时候不会报这种错呢？

是否是KeywordGroupMetaClass类中使用__new__动态给类添加了_info属性呢？

新手求教！