AirTest报错RuntimeError: call depth exceed 4

bash 复制代码

File "/opt/anaconda3/envs/airtest-multi-device/lib/python3.13/site-packages/poco/proxy.py", line 657, in wait
    while not self.exists():
              ~~~~~~~~~~~^^
  File "/opt/anaconda3/envs/airtest-multi-device/lib/python3.13/site-packages/poco/proxy.py", line 72, in wrapped
    return func(proxy, *args, **kwargs)
  File "/opt/anaconda3/envs/airtest-multi-device/lib/python3.13/site-packages/poco/proxy.py", line 774, in exists
    return self.attr('visible')
           ~~~~~~~~~^^^^^^^^^^^
  File "/opt/anaconda3/envs/airtest-multi-device/lib/python3.13/site-packages/poco/proxy.py", line 39, in wrapped
    return func(self, *args, **kwargs)
  File "/opt/anaconda3/envs/airtest-multi-device/lib/python3.13/site-packages/poco/proxy.py", line 734, in attr
    nodes = self._do_query(multiple=False)
  File "/opt/anaconda3/envs/airtest-multi-device/lib/python3.13/site-packages/poco/proxy.py", line 884, in _do_query
    self._nodes = self.poco.agent.hierarchy.select(self.query, multiple)
                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/anaconda3/envs/airtest-multi-device/lib/python3.13/site-packages/poco/freezeui/hierarchy.py", line 90, in select
    return self.selector.select(query, multiple)
           ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^
  File "/opt/anaconda3/envs/airtest-multi-device/lib/python3.13/site-packages/poco/sdk/Selector.py", line 77, in select
    return self.selectImpl(cond, multiple, self.getRoot(), 9999, True, True)
                                           ~~~~~~~~~~~~^^
  File "/opt/anaconda3/envs/airtest-multi-device/lib/python3.13/site-packages/poco/sdk/Selector.py", line 71, in getRoot
    return self.dumper.getRoot()
           ~~~~~~~~~~~~~~~~~~~^^
  File "/opt/anaconda3/envs/airtest-multi-device/lib/python3.13/site-packages/poco/freezeui/hierarchy.py", line 35, in getRoot
    root = Node(self.dumpHierarchy())
                ~~~~~~~~~~~~~~~~~~^^
  File "/opt/anaconda3/envs/airtest-multi-device/lib/python3.13/site-packages/poco/drivers/ios/__init__.py", line 54, in dumpHierarchy
    jsonObj = self.client.driver.source(format='json')
  File "/opt/anaconda3/envs/airtest-multi-device/lib/python3.13/site-packages/wda/__init__.py", line 464, in source
    return self.http.get('source?format=' + format).value
           ~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/opt/anaconda3/envs/airtest-multi-device/lib/python3.13/site-packages/wda/utils.py", line 43, in _inner
    raise RuntimeError("call depth exceed %d" % n)
RuntimeError: call depth exceed 4

根因分析

错误的完整调用链如下：

gongjiao() 调用 poco("测试").wait(timeout=10).exists()
wait() 内部循环调用 exists()，每次都会触发 UI 层级dump
exists() → dumpHierarchy() → wda.source() → http.get() → _fetch()
关键点 ：wda 库的 _fetch() 方法被 @limit_call_depth(4) 装饰器包裹。当 HTTP 请求失败时，错误回调返回 RET_RETRY，导致 _fetch() 递归调用自身
递归4次后，limit_call_depth 装饰器抛出 RuntimeError: call depth exceed 4

修复方案

捕获报错，可以继续运行

python 复制代码

def safe_poco_wait_exists(poco_proxy, timeout=10, retries=3, interval=5):
    """安全的 poco wait+exists 封装，捕获 wda call depth exceed 异常并重试。

    Args:
        poco_proxy: poco 元素代理对象，如 poco("公交")
        timeout: wait 超时时间（秒）
        retries: 遇到 RuntimeError 时的最大重试次数
        interval: 重试间隔（秒）

    Returns:
        bool: 元素是否存在（全部重试失败后返回 False）
    """
    for attempt in range(retries):
        try:
            return poco_proxy.wait(timeout=timeout).exists()
        except RuntimeError as e:
            if "call depth exceed" in str(e):
                log(f"[safe_poco_wait_exists] 第{attempt + 1}次遇到 wda call depth exceed 错误，{interval}秒后重试: {e}")
                if attempt < retries - 1:
                    sleep(interval)
                else:
                    log(f"[safe_poco_wait_exists] 已达最大重试次数({retries})，返回 False")
                    return False
            else:
                raise
    return False