Python自定义子包导入自定义类失败，求问题排查帮助

Hey there! As someone who’s stumbled through plenty of Python import headaches early on, let’s walk through the most common fixes for this issue step by step:

1. Verify Your Directory Structure & Package Setup #

First, double-check that your project is organized correctly so Python recognizes alexaevents as a valid package. Your structure should look something like this:

your_project_root/
├── main.py
└── alexaevents/
    ├── __init__.py  # This file is key (can be completely empty!)
    └── irish_times_event_handler.py

• If the alexaevents folder doesn’t have an __init__.py file, create an empty one. While Python 3.3+ supports implicit namespace packages, adding this file often resolves recognition issues, especially in older environments.

2. Check Your Working Directory #

Python looks for modules relative to your current working directory. If you’re running main.py from a folder that’s not your project root, it won’t be able to locate alexaevents.

To debug this, add these lines at the top of main.py to see where Python is searching:

import os
print("Current working directory:", os.getcwd())

If the output isn’t your project root (the folder holding main.py and alexaevents), fix it by:

• Navigating to your project root in the terminal before running python main.py
• Or, adding this code to main.py to force Python to include your project root in its search path:

  import sys
  import os
  # Add the directory containing main.py to the module search path
  sys.path.append(os.path.dirname(os.path.abspath(__file__)))
  

3. Match Filename & Import Case Exactly #

On Linux or macOS, filenames are case-sensitive—even a tiny mismatch will break the import. Make sure:

• The actual filename (e.g., irish_times_event_handler.py) matches the name in your import statement exactly
• You haven’t mixed up underscores, capitalization, or spelling (e.g., IrishTimesEventHandler.py vs. irish_times_event_handler.py)

4. Confirm Virtual Environment Setup #

If you’re using a virtual environment:

• Ensure you’ve activated the correct environment before running main.py
• Make sure the alexaevents folder lives within your project directory (not installed globally in a different environment)

Start with these steps—9 times out of 10, the issue is one of these common pitfalls. Let me know if you still hit snags!

内容的提问来源于stack exchange，提问作者bloopiebloopie