wda 有一些报错，不便于上层识别是哪种类型的错误

[Roise0568]

创建session时，有时会出错 KeyError: 'capabilites'，可否提供wda的错误类型，便于捕捉识别错误并处理，谢谢！

class Session(object): def init(self, httpclient, session_id): self.http = httpclient self._target = None self._timeout = 30.0 # default elment search timeout, change through implicitly_wait(.) v = self.http.get('/').value try: self.capabilities = v['capabilities'] except KeyError: raise AnyWdaErrorType("error message description")

    self._sid = v['sessionId']
    self.__scale = None

[codeskyblue]

什么时候会出现？

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