使用Fastdeploy之后就无法导入Taskflow？另外同一进程无法加载两个Fastdeploy模型？

[Strepsiades]

环境windows, x86, cpu, paddle2.6.1, paddlenlp2.6.1, fastdeploy-python 1.07

我想在本地部署三个模型脚本，其中两个只依赖fastdeploy，第三个fastdeploy示例里没有因此用的是paddlenlp的Taskflow。

首先感谢fastdeploy团队，大大加速我的模型在cpu上的推理速度。但是现在遇到三个问题，其中前两个已经避开了，第三个有点麻烦：

第一，我的两个fastdeploy脚本就是使用example里的ocr和uie python脚本进行简单封装，创建模型对象，调用预测函数。这两个单独都能正常运行工作，但是两个不能运行在一个进程，否则第一个预测时会失效，表现为无返回结果不报错。这个我通过多进程调用解决了，两个都能正常工作。请问这是正常现象嘛，还是是bug？虽然我知道可能服务化部署多进程调用才是正确的，但是小规模使用还是希望一个进程直接调用比较方便。

第二，fastdeploy加载的模型内存对象如果出了作用域，即使用python默认的复制、return把赋值给别的变量，fastdeploy的模型也会失效，表现为无返回结果不报错。这个我通过创建对象，把模型保存在对象成员变量里把这个问题解决了。不过感觉这个行为和一般的python绑定cpp对象行为不一致，比如numpy的对象不管怎么复制还是在一个函数里创建，返回到函数外面也能用，不会失效。不知道会不会改进。

def create_model():
    uie_model = UIEModel(...)
    uie_model.predict(...) # 这里predict有效
    return uie_mode
uie_model = create_model()
uie_model.predict(...) # 这里predict失效，无报错，不返回结果  

第三，导入fastdeploy相关库后，无法导入Taskflow。反之，导入Taskflow后，无法导入fastdeploy。这个问题也没办法通过单个python解释器开启多进程脚本解决。我再wsl里测试也是类似效果。

import fastdeploy
from paddlenlp import Taskflow

报错

Error: Can not import paddle core while this file exists: d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\base\libpaddle.pyd
Traceback (most recent call last):
  File "d:\SeafileData\rush1993\My Libraries\OneDrive\CodeLearning\Paddle\general_card_uie_singleton\test_scripts\test_import.py", line 2, in <module>
    from paddlenlp import Taskflow
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddlenlp\__init__.py", line 33, in <module>
    import paddle
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\__init__.py", line 28, in <module>
    from .base import core  # noqa: F401
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\base\__init__.py", line 36, in <module>
    from . import core
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\base\core.py", line 380, in <module>
    raise e
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\base\core.py", line 268, in <module>
    from . import libpaddle
ImportError: DLL load failed while importing libpaddle: 找不到指定的程序。
(fastdeploy) PS D:\SeafileData\rush1993\My Libraries\OneDrive\CodeLearning\Paddle\general_card_uie_singleton> ^C
(fastdeploy) PS D:\SeafileData\rush1993\My Libraries\OneDrive\CodeLearning\Paddle\general_card_uie_singleton>
(fastdeploy) PS D:\SeafileData\rush1993\My Libraries\OneDrive\CodeLearning\Paddle\general_card_uie_singleton>  d:; cd 'd:\SeafileData\rush1993\My Libraries\OneDrive\CodeLearning\Paddle\general_card_uie_singleton'; & 'd:\miniconda\envs\fastdeploy\python.exe' 'c:\Users\zhaoy\.vscode\extensions\ms-python.debugpy-2024.10.0-win32-x64\bundled\libs\debugpy\adapter/../..\debugpy\launcher' '56080' '--' 'd:\SeafileData\rush1993\My Libraries\OneDrive\CodeLearning\Paddle\general_card_uie_singleton\test_scripts\test_import.py' 
Error: Can not import paddle core while this file exists: d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\base\libpaddle.pyd
Traceback (most recent call last):
  File "d:\SeafileData\rush1993\My Libraries\OneDrive\CodeLearning\Paddle\general_card_uie_singleton\test_scripts\test_import.py", line 2, in <module>
    from paddlenlp import Taskflow
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddlenlp\__init__.py", line 33, in <module>
    import paddle
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\__init__.py", line 28, in <module>
    from .base import core  # noqa: F401
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\base\__init__.py", line 36, in <module>
    from . import core
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\base\core.py", line 380, in <module>
    raise e
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\base\core.py", line 268, in <module>
    from . import libpaddle
ImportError: DLL load failed while importing libpaddle: 找不到指定的程序。

如果反过来，如下：

from paddlenlp import Taskflow
import fastdeploy

报错

Error: Can not import paddle core while this file exists: d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\base\libpaddle.pyd
Traceback (most recent call last):
  File "d:\SeafileData\rush1993\My Libraries\OneDrive\CodeLearning\Paddle\general_card_uie_singleton\test_scripts\test_import.py", line 2, in <module>
    from paddlenlp import Taskflow
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddlenlp\__init__.py", line 33, in <module>
    import paddle
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\__init__.py", line 28, in <module>
    from .base import core  # noqa: F401
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\base\__init__.py", line 36, in <module>
    from . import core
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\base\core.py", line 380, in <module>
    raise e
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\paddle\base\core.py", line 268, in <module>
    from . import libpaddle
ImportError: DLL load failed while importing libpaddle: 找不到指定的程序。
(fastdeploy) PS D:\SeafileData\rush1993\My Libraries\OneDrive\CodeLearning\Paddle\general_card_uie_singleton> ^C
(fastdeploy) PS D:\SeafileData\rush1993\My Libraries\OneDrive\CodeLearning\Paddle\general_card_uie_singleton>
(fastdeploy) PS D:\SeafileData\rush1993\My Libraries\OneDrive\CodeLearning\Paddle\general_card_uie_singleton>  d:; cd 'd:\SeafileData\rush1993\My Libraries\OneDrive\CodeLearning\Paddle\general_card_uie_singleton'; & 'd:\miniconda\envs\fastdeploy\python.exe' 'c:\Users\zhaoy\.vscode\extensions\ms-python.debugpy-2024.10.0-win32-x64\bundled\libs\debugpy\adapter/../..\debugpy\launcher' '56160' '--' 'd:\SeafileData\rush1993\My Libraries\OneDrive\CodeLearning\Paddle\general_card_uie_singleton\test_scripts\test_import.py' 
d:\miniconda\envs\fastdeploy\lib\site-packages\_distutils_hack\__init__.py:32: UserWarning: Setuptools is replacing distutils. Support for replacing an already imported distutils is deprecated. In the future, this condition will fail. Register concerns at https://github.com/pypa/setuptools/issues/new?template=distutils-deprecation.yml
  warnings.warn(
Traceback (most recent call last):
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\fastdeploy\c_lib_wrap.py", line 164, in <module>
    from .libs.fastdeploy_main import *
ImportError: DLL load failed while importing fastdeploy_main: 找不到指定的程序。

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "d:\SeafileData\rush1993\My Libraries\OneDrive\CodeLearning\Paddle\general_card_uie_singleton\test_scripts\test_import.py", line 3, in <module>
    import fastdeploy
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\fastdeploy\__init__.py", line 122, in <module>
    from .c_lib_wrap import (
  File "d:\miniconda\envs\fastdeploy\lib\site-packages\fastdeploy\c_lib_wrap.py", line 166, in <module>
    raise RuntimeError(f"FastDeploy initalized failed! Error: {e}")
RuntimeError: FastDeploy initalized failed! Error: DLL load failed while importing fastdeploy_main: 找不到指定的程序。