python - 如何使用 pip requirements.txt 文件安装 python 模块附加功能

Question

pip requirements.txt documentation说可以使用像

这样的行安装附加功能

MyPackage==3.0 [PDF]

所以在我的 requirements.txt 文件中有一行内容如下:

requests==2.9.1 [security]

但是当我运行命令时，没有为请求模块安装安全附加功能:

pip install -r requirements.txt

我收到一条错误消息，提示我的文件格式不正确:

Invalid requirement: 'requests==2.9.1 [security]'
Traceback (most recent call last):
  File "/Library/Python/2.7/site-packages/pip/req/req_install.py", line 77, in __init__
    req = pkg_resources.Requirement.parse(req)
  File "/Library/Python/2.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 3036, in parse
    req, = parse_requirements(s)
  File "/Library/Python/2.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2980, in parse_requirements
    "version spec")
  File "/Library/Python/2.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2956, in scan_list
    raise RequirementParseError(msg, line, "at", line[p:])
RequirementParseError: Expected ',' or end-of-list in requests==2.9.1 [security] at  [security]

有谁知道我可能做错了什么吗？

Answer 1

正确的语法是:

requests[security] == 2.9.1 

链接的文档似乎是针对 pip v1.1，而最新的稳定版本是 v8.1。 latest docs for pip are here , 但您必须单击更多链接才能访问 formatting specs for requirements (PEP 0508) .