当'pip install r requirements.txt时，requirements.txt的扩展包规范的某些安装出现问题`

Question

在我的requirements.txt文件中，我有

torch==1.4.0+cpu torchvision==0.5.0+cpu -f https://download.pytorch.org/whl/torch_stable.html

然而，当我试着去做

pip install -r requirements.txt

我明白了

Invalid requirement: 'torch==1.4.0+cpu torchvision==0.5.0+cpu'
Traceback (most recent call last):
  File "c:\users\santosh\documents\github\zakta\zaktaenv2\lib\site-packages\pip\_vendor\packaging\requirements.py", line 92, in __init__
    req = REQUIREMENT.parseString(requirement_string)
  File "c:\users\santosh\documents\github\zakta\zaktaenv2\lib\site-packages\pip\_vendor\pyparsing.py", line 1617, in parseString
    raise exc
  File "c:\users\santosh\documents\github\zakta\zaktaenv2\lib\site-packages\pip\_vendor\pyparsing.py", line 1607, in parseString
    loc, tokens = self._parse( instring, 0 )
  File "c:\users\santosh\documents\github\zakta\zaktaenv2\lib\site-packages\pip\_vendor\pyparsing.py", line 1379, in _parseNoCache
    loc,tokens = self.parseImpl( instring, preloc, doActions )
  File "c:\users\santosh\documents\github\zakta\zaktaenv2\lib\site-packages\pip\_vendor\pyparsing.py", line 3376, in parseImpl
    loc, exprtokens = e._parse( instring, loc, doActions )
  File "c:\users\santosh\documents\github\zakta\zaktaenv2\lib\site-packages\pip\_vendor\pyparsing.py", line 1383, in _parseNoCache
    loc,tokens = self.parseImpl( instring, preloc, doActions )
  File "c:\users\santosh\documents\github\zakta\zaktaenv2\lib\site-packages\pip\_vendor\pyparsing.py", line 3164, in parseImpl
    raise ParseException(instring, loc, self.errmsg, self)
pip._vendor.pyparsing.ParseException: Expected stringEnd (at char 17), (line:1, col:18)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "c:\users\santosh\documents\github\zakta\zaktaenv2\lib\site-packages\pip\req\req_install.py", line 82, in __init__
    req = Requirement(req)
  File "c:\users\santosh\documents\github\zakta\zaktaenv2\lib\site-packages\pip\_vendor\packaging\requirements.py", line 96, in __init__
    requirement_string[e.loc:e.loc + 8]))
pip._vendor.packaging.requirements.InvalidRequirement: Invalid requirement, parse error at "'torchvis'"

因此，我认为它与扩展的pip命令有关，因此我认为我需要以某种方式在requirements.txt文件中对其进行不同的格式设置，可能使用引号、$或{}

Answer 1

编辑：
正如@georgexsh和@klausd.所评论的，requirements.txt不是pip的命令行，因此您需要去掉这些命令，并在单独的行中包含两个包

这里是关于requirements file format的文档链接

您只需在requirements.txt文件中包含以下两行：

torch==1.4.0
torchvision==0.5.0

然后跑

pip install -r requirements.txt