Pandas Modin ray库启动失败

Question

我正在尝试使用modin加速我的 pandas 数据处理

import os
os.environ["MODIN_ENGINE"] = "ray"
import modin.pandas as pd

df = pd.read_csv(r"C:\Users\Harshad\Documents\Files\Data\Pre-processed\data.csv", low_memory=False)

我收到以下警告和错误：

UserWarning: Ray execution environment not yet initialized. Initializing...
To remove this warning, run the following python code before doing dataframe operations:

    import ray
    ray.init()

Traceback (most recent call last):
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\ray\node.py", line 240, in __init__
    self.redis_password)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\ray\_private\services.py", line 328, in wait_for_node
    raise TimeoutError("Timed out while waiting for node to startup.")
TimeoutError: Timed out while waiting for node to startup.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:/Users/Harshad/Documents/Code/data.py", line 18, in <module>
    low_memory=False)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\modin\pandas\io.py", line 135, in read_csv
    return _read(**kwargs)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\modin\pandas\io.py", line 58, in _read
    Engine.subscribe(_update_engine)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\modin\config\pubsub.py", line 213, in subscribe
    callback(cls)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\modin\pandas\__init__.py", line 127, in _update_engine
    initialize_ray()
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\modin\core\execution\ray\common\utils.py", line 185, in initialize_ray
    ray.init(**ray_init_kwargs)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\ray\_private\client_mode_hook.py", line 105, in wrapper
    return func(*args, **kwargs)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\ray\worker.py", line 922, in init
    ray_params=ray_params)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\ray\node.py", line 243, in __init__
    "The current node has not been updated within 30 "
Exception: The current node has not been updated within 30 seconds, this could happen because of some of the Ray processes failed to startup.

虽然我已经清楚地重新运行代码，但它们之间的时间间隔超过 30 秒。

当我在安装 modin 和 ray 后第一次运行它时，它运行得相当好，只有以下警告：

UserWarning: Ray execution environment not yet initialized. Initializing...
To remove this warning, run the following python code before doing dataframe operations:

    import ray
    ray.init()

然后我将代码修改为：

import os
os.environ["MODIN_ENGINE"] = "ray"
import modin.pandas as pd
import ray
ray.init()
df = pd.read_csv(r"C:\Users\Harshad\Documents\Files\Data\Pre-processed\data.csv", low_memory=False)

我收到此错误：

Traceback (most recent call last):
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\ray\node.py", line 240, in __init__
    self.redis_password)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\ray\_private\services.py", line 328, in wait_for_node
    raise TimeoutError("Timed out while waiting for node to startup.")
TimeoutError: Timed out while waiting for node to startup.

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:/Users/Harshad/Documents/Code/data.py", line 18, in <module>
    low_memory=False)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\modin\pandas\io.py", line 135, in read_csv
    return _read(**kwargs)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\modin\pandas\io.py", line 58, in _read
    Engine.subscribe(_update_engine)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\modin\config\pubsub.py", line 213, in subscribe
    callback(cls)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\modin\pandas\__init__.py", line 127, in _update_engine
    initialize_ray()
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\modin\core\execution\ray\common\utils.py", line 185, in initialize_ray
    ray.init(**ray_init_kwargs)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\ray\_private\client_mode_hook.py", line 105, in wrapper
    return func(*args, **kwargs)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\ray\worker.py", line 922, in init
    ray_params=ray_params)
  File "C:\Users\Harshad\Documents\pythonProject\venv\lib\site-packages\ray\node.py", line 243, in __init__
    "The current node has not been updated within 30 "
Exception: The current node has not been updated within 30 seconds, this could happen because of some of the Ray processes failed to startup

当我查看这个问题的 Github 时，发现它是一个错误

如何解决这些警告和错误？

编辑：我重新启动了我的 pycharm 环境，它允许重新运行一个周期。 这表明它是 Pycharm/环境问题？

我该如何解决这个问题？

Answer 1

在 import modin之前尝试init ing ray ：

import os
os.environ["MODIN_ENGINE"] = "ray"
import ray
ray.init()
import modin.pandas as pd