python - 当包源来自特定网站时如何格式化requirements.txt？

Question

我正在尝试使用从另一个网站下载的 pip 将以下安装命令转换为 requirements.txt 格式，但无法弄清楚如何。任何人都可以提供帮助吗？

pip install torch==1.5.0+cu101 torchvision==0.6.0+cu101 -f https://download.pytorch.org/whl/torch_stable.html

pip install detectron2 -f https://dl.fbaipublicfiles.com/detectron2/wheels/cu101/index.html

Answer 1

format for the requirements.txt file定义如下:

[[--option]...]
<requirement specifier> [; markers] [[--option]...]
<archive url/path>
[-e] <local project path>
[-e] <vcs project url>

<requirement specifier> 定义包和可选版本。

SomeProject
SomeProject == 1.3
SomeProject >=1.2,<2.0
SomeProject[foo, bar]
SomeProject~=1.4.2

--option (例如 -f / --find-links )与 pip install options 相同如果你在做 pip install，你会使用从命令行。

The following options are supported:

• -i, --index-url
• --extra-index-url
• --no-index
• -c, --constraint
• -r, --requirement
• -e, --editable
• -f, --find-links
• --no-binary
• --only-binary
• --require-hashes
• --pre
• --trusted-host

因此，对于您的安装命令，requirements.txt 将如下所示:

# Torch
--find-links https://download.pytorch.org/whl/torch_stable.html
torch==1.5.0+cu101
torchvision==0.6.0+cu101

# Detectron
--find-links https://dl.fbaipublicfiles.com/detectron2/wheels/cu101/index.html
detectron2

确保验证链接的使用是否正确:

$ pip install -r requirements.txt 
Looking in links: https://download.pytorch.org/whl/torch_stable.html, https://dl.fbaipublicfiles.com/detectron2/wheels/cu101/index.html
Collecting torch==1.5.0+cu101 (from -r requirements.txt (line 3))
  Using cached https://download.pytorch.org/whl/cu101/torch-1.5.0%2Bcu101-cp38-cp38-linux_x86_64.whl
Collecting torchvision==0.6.0+cu101 (from -r requirements.txt (line 4))
  Using cached https://download.pytorch.org/whl/cu101/torchvision-0.6.0%2Bcu101-cp38-cp38-linux_x86_64.whl
Collecting detectron2 (from -r requirements.txt (line 8))
  Using cached https://dl.fbaipublicfiles.com/detectron2/wheels/cu101/detectron2-0.1.2%2Bcu101-cp38-cp38-linux_x86_64.whl
...

作为旁注，您 originally said "(not github)"在你的标题中。使用 pip 安装的软件包的默认来源托管在 PyPi 上: https://files.pythonhosted.org/ .您可以在访问 时看到实际链接。下载文件 PyPi 中包的部分(例如 Torch)。