Windows环境下Python 3.7.0a2安装Pillow失败求助

Hey there, I’ve run into this exact problem before on Windows with Python 3.7—installing Pillow via pip fails because it needs system-level build tools that aren’t included by default. Let’s walk through the easiest fixes to get you back to migrating your Django project:

1. Use a Pre-compiled Pillow Wheel (Quickest Fix) #

Instead of letting pip try to build Pillow from source (which is causing that traceback), grab a pre-built wheel file tailored to your setup:

• First, check if your Python is 32-bit or 64-bit: open Command Prompt and run python -c "import sys; print(sys.maxsize > 2**32)"—if it returns True, you’re on 64-bit; False means 32-bit.
• Find a Pillow wheel that matches Python 3.7 and your system architecture. Look for filenames like Pillow-8.4.0-cp37-cp37m-win_amd64.whl (64-bit) or Pillow-8.4.0-cp37-cp37m-win32.whl (32-bit).
• Download that wheel file to a folder you can easily access.
• Navigate to that folder in Command Prompt, then run:

  pip install [name-of-your-downloaded-wheel-file].whl
  

  For example: pip install Pillow-8.4.0-cp37-cp37m-win_amd64.whl

2. Install Required Build Tools (If You Want to Compile Locally) #

If you’d rather build Pillow from source, you need to install Microsoft’s C++ build tools:

• Install the Microsoft Visual C++ Build Tools 2017 (make sure to check the "Desktop development with C++" workload when setting it up—this includes the compilers pip needs).
• Restart your Command Prompt after installation, then run pip install Pillow again. This time, pip should have all the tools it needs to compile Pillow successfully.

3. Confirm It Worked & Run Migrations #

Once Pillow is installed, verify it’s working by running:

python -c "import PIL; print(PIL.__version__)"

If you see a version number (like 8.4.0) without errors, head back to your Django project folder and re-run the migrations:

python manage.py migrate

That should resolve the fields.E210 error you got earlier.

Why This Happens #

Python 3.7 on Windows doesn’t come with the C++ compilers required to build Pillow from source. Pre-built wheels skip the compilation step entirely, while installing the build tools gives pip the necessary environment to compile the package locally.

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