Qlib 常见问题解答

Qlib 常见问题解答

1. RuntimeError: 在当前进程完成其引导阶段之前，尝试启动一个新进程…

RuntimeError:
        An attempt has been made to start a new process before the
        current process has finished its bootstrapping phase.

        This probably means that you are not using fork to start your
        child processes and you have forgotten to use the proper idiom
        in the main module:

            if __name__ == '__main__':
                freeze_support()
                ...

        The "freeze_support()" line can be omitted if the program
        is not going to be frozen to produce an executable.

这是由于Windows操作系统下多进程的限制引起的。更多信息请参考这里。

解决方案: 要选择启动方法，你可以在主模块的 D.features 中使用 if __name__ == ‘__main__’ 子句。例如：

import qlib
from qlib.data import D


if __name__ == "__main__":
    qlib.init()
    instruments = ["SH600000"]
    fields = ["$close", "$change"]
    df = D.features(instruments, fields, start_time='2010-01-01', end_time='2012-12-31')
    print(df.head())

2. qlib.data.cache.QlibCacheException: 它发现redis锁的key(…)已经存在于你的redis数据库中。

它看到Redis锁的键现在已经存在于你的Redis数据库中。你可以使用以下命令来清除你的Redis键并重新运行你的命令

$ redis-cli
> select 1
> flushdb

如果问题未解决，使用keys *来查找是否存在多个键。如果是，尝试使用flushall来清除所有键。

注意

qlib.config.redis_task_db 默认值为 1，用户可以使用 qlib.init(redis_task_db=) 进行设置。

此外，欢迎在我们的GitHub仓库中发布新问题。我们总是仔细检查每个问题，并尽力解决它们。

3. ModuleNotFoundError: 没有名为‘qlib.data._libs.rolling’的模块

#### Do not import qlib package in the repository directory in case of importing qlib from . without compiling #####
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "qlib/qlib/__init__.py", line 19, in init
    from .data.cache import H
File "qlib/qlib/data/__init__.py", line 8, in <module>
    from .data import (
File "qlib/qlib/data/data.py", line 20, in <module>
    from .cache import H
File "qlib/qlib/data/cache.py", line 36, in <module>
    from .ops import Operators
File "qlib/qlib/data/ops.py", line 19, in <module>
    from ._libs.rolling import rolling_slope, rolling_rsquare, rolling_resi
ModuleNotFoundError: No module named 'qlib.data._libs.rolling'

  • 如果在使用PyCharm IDE导入qlib包时发生错误，用户可以在项目根文件夹中执行以下命令来编译Cython文件并生成可执行文件：

    python setup.py build_ext --inplace

  • 如果在使用python命令导入qlib包时发生错误，用户需要更改运行目录，以确保脚本不在项目目录中运行。

4. BadNamespaceError: / 不是一个已连接的命名空间

File "qlib_online.py", line 35, in <module>
  cal = D.calendar()
File "e:\code\python\microsoft\qlib_latest\qlib\qlib\data\data.py", line 973, in calendar
  return Cal.calendar(start_time, end_time, freq, future=future)
File "e:\code\python\microsoft\qlib_latest\qlib\qlib\data\data.py", line 798, in calendar
  self.conn.send_request(
File "e:\code\python\microsoft\qlib_latest\qlib\qlib\data\client.py", line 101, in send_request
  self.sio.emit(request_type + "_request", request_content)
File "G:\apps\miniconda\envs\qlib\lib\site-packages\python_socketio-5.3.0-py3.8.egg\socketio\client.py", line 369, in emit
  raise exceptions.BadNamespaceError(
BadNamespaceError: / is not a connected namespace.

  • qlib 中的 python-socketio 版本需要与 qlib-server 中的 python-socketio 版本相同：

    pip install -U python-socketio==<qlib-server python-socketio version>

5. TypeError: send() 收到了一个意外的关键字参数 'binary'

File "qlib_online.py", line 35, in <module>
  cal = D.calendar()
File "e:\code\python\microsoft\qlib_latest\qlib\qlib\data\data.py", line 973, in calendar
  return Cal.calendar(start_time, end_time, freq, future=future)
File "e:\code\python\microsoft\qlib_latest\qlib\qlib\data\data.py", line 798, in calendar
  self.conn.send_request(
File "e:\code\python\microsoft\qlib_latest\qlib\qlib\data\client.py", line 101, in send_request
  self.sio.emit(request_type + "_request", request_content)
File "G:\apps\miniconda\envs\qlib\lib\site-packages\socketio\client.py", line 263, in emit
  self._send_packet(packet.Packet(packet.EVENT, namespace=namespace,
File "G:\apps\miniconda\envs\qlib\lib\site-packages\socketio\client.py", line 339, in _send_packet
  self.eio.send(ep, binary=binary)
TypeError: send() got an unexpected keyword argument 'binary'