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Python如何导入自定义的类

article 2025/1/8 11:24:59

目录结构

project/
├── ultralytics/          # Ultralytics library
│   ├── utils/
│   │   ├── __init__.py
│   │   ├── settings.py
│   └── ...
├── explore/              # Your script directory
│   └── Testsettings.py
└── ...

Tesettings.py

导入类错误

从Testsettings.py导入 ultralytics/utils 的class SettingManager

from ultralytics.utils.__init__ import SettingsManager
settings = SettingsManager()

  File "d:\Code\ultralytics\Explore\TestSetting.py", line 15, in <module>
    from ultralytics.utils.__init__ import SettingsManager
ModuleNotFoundError: No module named 'ultralytics'
PS D:\Code\ultralytics>

修改sys.path

查看sys.path,当前脚本仅从，以下目录中寻找import的类

import sys
print(sys.path)

"""
['d:\\Code\\ultralytics\\Explore', 
'D:\\Software\\Miniconda3\\envs\\pytorchgpu\\python310.zip', 
'D:\\Software\\Miniconda3\\envs\\pytorchgpu\\DLLs', 
'D:\\Software\\Miniconda3\\envs\\pytorchgpu\\lib', 
'D:\\Software\\Miniconda3\\envs\\pytorchgpu', 
'D:\\Software\\Miniconda3\\envs\\pytorchgpu\\lib\\site-packages', 
'D:\\Software\\Miniconda3\\envs\\pytorchgpu\\lib\\site-packages\\win32', 
'D:\\Software\\Miniconda3\\envs\\pytorchgpu\\lib\\site-packages\\win32\\lib', 
'D:\\Software\\Miniconda3\\envs\\pytorchgpu\\lib\\site-packages\\Pythonwin']
"""

添加路径，成功运行

添加整个project到sys.path路径中

import sys
import os 

"""
__file______:current_file.py
"""

parent_dir = os.path.abspath(os.path.join(os.path.dirname(__file__), ".."))

sys.path.append(parent_dir)

from ultralytics.utils.__init__ import SettingsManager
settings = SettingsManager()

print(sys.path)

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