个人项目导入PaddleX后logging日志打印在初始化create_pipeline后无法输出

发现问题

前几天写了一个项目，需要用到paddlex包中的OCR检测产线。于是我pip install paddlex导入paddlex，在create_pipeline后，很惊讶的发现我在当前文件自定义的logging竟然不输出东西了！

测试问题

于是我写了一个小demo来验证这个问题。代码如下：

import logging
import coloredlogs
from paddlex import create_pipeline

logger = logging.getLogger(__name__)
coloredlogs.install(level="INFO")

if __name__ == "__main__":
    logger.info(111)
    pipeline = create_pipeline(pipeline="seal_recognition")
    logger.info(222)

尝试运行后问题就出现了，logger.info("222")居然被吞了！

思考问题

那么究竟是什么原因导致的这个问题呢，我们进入paddlex/utils包中发现其存在重写的logging.py文件，paddlex这玩意一定有东西和我代码的logging有冲突。
那么，如何验证这个冲突呢？

解决问题

我写了一个demo测试了一下该问题！

import logging
import coloredlogs

from paddlex import create_pipeline

def debug_logger_config():
    root = logging.getLogger()
    current = logging.getLogger(__name__)
    print(f"[Root] Level: {root.level}, Handlers: {root.handlers}")
    print(f"[Current] Level: {current.level}, Effective Level: {current.getEffectiveLevel()}, Handlers: {current.handlers}")

logger = logging.getLogger(__name__)
coloredlogs.install(level="INFO")

print("Before create_pipeline:")
debug_logger_config()
logger.info(111)

pipeline = create_pipeline(pipeline="seal_recognition")

print("\nAfter create_pipeline:")
debug_logger_config()
logger.info(222)

运行后输出

Before create_pipeline:
[Root] Level: 20, Handlers: [<StandardErrorHandler <stderr> (INFO)>]
[Current] Level: 0, Effective Level: 20, Handlers: []
2025-02-20 08:30:52 XXZX-Cheny __main__[21664] INFO 111
Using official model (RT-DETR-H_layout_3cls), the model files will be be automatically downloaded and saved in C:\Users\cheny\.paddlex\official_models.
Using official model (PP-OCRv4_server_seal_det), the model files will be be automatically downloaded and saved in C:\Users\cheny\.paddlex\official_models.
Using official model (PP-OCRv4_server_rec), the model files will be be automatically downloaded and saved in C:\Users\cheny\.paddlex\official_models.

After create_pipeline:
[Root] Level: 30, Handlers: [<StandardErrorHandler <stderr> (INFO)>]  # 被重置
[Current] Level: 0, Effective Level: 30, Handlers: [] # 当前Level等级为30，也就是只输出Warning以上的日志

我们发现，在这个demo中，create_pipeline修改了根日志配置，将日志输出等级重置为warning的30，超出了info等级的20。然而，我们本地文件日志输出等级是20，所以就无法输出现有日志了！
解决这个问题非常简单，那就是需要你在当前文件手动加入logger.setLevel(logging.INFO)，显式绑定到记录器后问题解决。样例如下：

logger = logging.getLogger(__name__)
coloredlogs.install(level="INFO")
logger.setLevel(logging.INFO)

此时，我们再尝试一下运行demo后输出

Before create_pipeline:
[Root] Level: 20, Handlers: [<StandardErrorHandler <stderr> (INFO)>]
[Current] Level: 20, Effective Level: 20, Handlers: []
2025-02-20 08:37:27 XXZX-Cheny __main__[33700] INFO 111
Using official model (RT-DETR-H_layout_3cls), the model files will be be automatically downloaded and saved in C:\Users\cheny\.paddlex\official_models.
Using official model (PP-OCRv4_server_seal_det), the model files will be be automatically downloaded and saved in C:\Users\cheny\.paddlex\official_models.
Using official model (PP-OCRv4_server_rec), the model files will be be automatically downloaded and saved in C:\Users\cheny\.paddlex\official_models.

After create_pipeline:
[Root] Level: 30, Handlers: [<StandardErrorHandler <stderr> (INFO)>] # 被重置
[Current] Level: 20, Effective Level: 20, Handlers: [] # 由于显式绑定，所以没有改变
2025-02-20 08:37:45 XXZX-Cheny __main__[33700] INFO 222 #

后记

该问题已经被我反馈到PaddleX仓库，具体Issue链接如下：https://github.com/PaddlePaddle/PaddleX/issues/3402