安装 Pillow with Poetry 后无法导入 PIL

Question

I'm trying to install and use Pillow with Python 3.9.2 (managed with pyenv). I'm using Poetry to manage my virtual environments and dependencies, so I ran poetry add pillow , which successfully added Pillow = "^8.2.0" to my pyproject.toml. Per the Pillow docs, I added from PIL import Image in my script, but when I try to run it, I get:

File "<long/path/to/file.py>", line 3, in <module>
    from PIL import Image
ModuleNotFoundError: No module named 'PIL'

When I look in the venv Poetry is creating for me, I can see a PIL directory ( /long/path/lib/python3.9/site-packages/PIL/ ) and an Image.py file inside it.

What am I missing here? I've tried:

• Downcasing to from pil import Image per this ; did not work
• Downgrading to lower versions of Python and PIL; works, but defeats the purpose
• ETA: Exporting a requirements.txt file from Poetry, creating a virtualenv with venv, and installing the packages manually; works, but cuts me off from using Poetry/pyproject.toml

Any help would be tremendously appreciated.

Answer 1

I couldn't find a way to solve this either (using poetry 1.1.13).

Ultimately, I resorted to a workaround of poetry add pillow && pip install pillow so I could move on with my life. :P

poetry add pillow gets the dependency in to the TOML, so consumers of the package should be OK.

Answer 2

capitalizing "Pillow" solved it for me:

poetry add Pillow