`诗运行黑myscript.py`和`黑myscript.py`有什么区别？

Question

Likewise if you have command line tools such as pytest or black you can run them using poetry run pytest

建议使用 black 的方法是：

poetry run black myscript.py

但是，如果我只是使用

，我没有发现任何行为差异

black myscript.py

这两种方法有什么区别？

Answer 1

它允许您运行 black（或 run 之后的任何命令）安装在您的虚拟环境中 而无需先激活您的虚拟环境.

相关注释在 poetry run docs（强调我的）：

The run command executes the given command inside the project’s virtualenv.

假设您有这个 poetry-demo 项目和 main.py，并且您安装了 black :

poetry-demo$ ls
README.rst     main.py        poetry.lock    poetry_demo    pyproject.toml tests

poetry-demo$ poetry add black
The following packages are already present in the pyproject.toml and will be skipped:

  • black

...

如果您没有先激活您的虚拟环境（即 poetry shell）并且 如果您没有在系统的其他任何地方安装 black，简单地做 black file.py 会失败：

poetry-demo$ which black

poetry-demo$ black main.py
-bash: black: command not found

但是，使用 poetry run，即使不激活您的虚拟环境，您也可以运行 black:

poetry-demo$ poetry run black main.py
All done! ✨  ✨
1 file left unchanged.

你困惑的根源可能是因为你已经激活了你的虚拟环境，所以真的没有区别：

poetry-demo$ poetry shell
Spawning shell within /path/to/virtualenvs/poetry-demo-hCA44HQ0-py3.8
poetry-demo$ . /path/to/virtualenvs/poetry-demo-hCA44HQ0-py3.8/bin/activate

(poetry-demo-hCA44HQ0-py3.8) poetry-demo$ black main.py
All done! ✨  ✨
1 file left unchanged.

(poetry-demo-hCA44HQ0-py3.8) poetry-demo$ poetry run black main.py
All done! ✨  ✨
1 file left unchanged.

`诗运行黑myscript.py`和`黑myscript.py`有什么区别？

What is the difference between `poetry run black myscript.py` and `black myscript.py`?

python

python-poetry

python-black