Python 3.7中已安装Spectral库却无法导入的问题求助

It’s super frustrating when you’ve followed the install steps correctly but still hit a module not found error—let’s break down the most likely fixes for your case:

1. Verify You’re Using the Right Python Environment #

The most common culprit here is a mismatch between the Python version you installed spectral into and the one running your script.

• First, check which Python is running your script: open a command prompt, navigate to your script’s folder, and run:

  python --version
  

  Make sure this outputs Python 3.7.x.

• Then check which Python your pip is linked to:

  pip --version
  

  The path shown here should match your Python 3.7 installation directory (e.g., C:\Python37\lib\site-packages). If it doesn’t, use version-specific commands to install to the right environment:

  python3.7 -m pip install spectral
  

  Or use the full path to your 3.7 interpreter if you have multiple versions installed:

  C:\Python37\python.exe -m pip install spectral
  

2. Reinstall Using Python’s -m Flag #

Sometimes pip can be linked to a different Python instance than you expect. Using python -m pip ensures you’re installing directly into the environment of the Python you’re calling.

Run this command (make sure it targets your Python 3.7 installation):

python -m pip install --upgrade spectral

The --upgrade flag also ensures you have the latest version installed.

3. Check for Virtual Environments #

If you’re using a virtual environment (like venv or conda) for your project, the spectral library was probably installed to your global Python instead of the virtual environment.

• Activate your project’s virtual environment first (for venv on Windows, this is usually .\venv\Scripts\activate).
• Once activated, run the install command again:

  pip install spectral
  

4. Confirm the Library is Actually Installed #

Open a Python 3.7 interactive shell by running python (ensure it’s the 3.7 version) and try importing the module directly:

import spectral
print(spectral.__version__)

If this works without errors, the library is installed correctly—your script is just using the wrong Python interpreter. In this case:

• If using an IDE (like VS Code or PyCharm), go to project settings and set the interpreter to your Python 3.7 installation.
• If running from the command line, use the full path to your 3.7 interpreter to run the script:

  C:\Python37\python.exe "C:\Users\lenovo\hyprspectral classification using nn\Hyper-Spectral-Net.py"
  

5. Clean Up Conflicting Installs #

If you ran both python setup.py install and pip install spectral, there might be conflicting installations. Uninstall first, then reinstall cleanly:

pip uninstall spectral
python -m pip install spectral

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