在Windows上的Python 3.4上安装Twain模块

我按此操作，但收到一条错误消息：

C:\Users\PB>pip install twain --no-compile
Downloading/unpacking twain
Could not find any downloads that satisfy the requiremen
Cleaning up...
No distributions at all found for twain
Storing debug log for failure in C:\Users\PB\pip\pip.log

Exception:
Traceback (most recent call last):
File "C:\Python3.4\lib\site-packages\pip\basecommand.py", line 122, in main
status = self.run(options, args)
   File "C:\Python3.4\lib\site-packages\pip\commands\install.py", line 257,in run   
InstallRequirement.from_line(name, None))
File "C:\Python3.4\lib\site-packages\pip\req.py", line 172, in from_line
return cls(req, comes_from, url=url, prereleases=prereleases)
File "C:\Python3.4\lib\site-packages\pip\req.py", line 70, in __init__
     req = pkg_resources.Requirement.parse(req)
File "C:\Python3.4\lib\site-packages\pip\_vendor\pkg_resources.py", line2606,
in parse
reqs = list(parse_requirements(s))
File "C:\Python3.4\lib\site-packages\pip\_vendor\pkg_resources.py",line2532 
in parse_requirements
raise ValueError("Missing distribution spec", line)
ValueError: ('Missing distribution spec', '==')

Storing debug log for failure in C:\Users\PB\pip\pip.log

我研究并找到了一个并尝试了以下命令：

pip install twain == 1.0.5 --allow-unverified twain

并收到一条错误消息：

C:\Users\PB>pip install twain --no-compile
Downloading/unpacking twain
Could not find any downloads that satisfy the requiremen
Cleaning up...
No distributions at all found for twain
Storing debug log for failure in C:\Users\PB\pip\pip.log

Exception:
Traceback (most recent call last):
File "C:\Python3.4\lib\site-packages\pip\basecommand.py", line 122, in main
status = self.run(options, args)
   File "C:\Python3.4\lib\site-packages\pip\commands\install.py", line 257,in run   
InstallRequirement.from_line(name, None))
File "C:\Python3.4\lib\site-packages\pip\req.py", line 172, in from_line
return cls(req, comes_from, url=url, prereleases=prereleases)
File "C:\Python3.4\lib\site-packages\pip\req.py", line 70, in __init__
     req = pkg_resources.Requirement.parse(req)
File "C:\Python3.4\lib\site-packages\pip\_vendor\pkg_resources.py", line2606,
in parse
reqs = list(parse_requirements(s))
File "C:\Python3.4\lib\site-packages\pip\_vendor\pkg_resources.py",line2532 
in parse_requirements
raise ValueError("Missing distribution spec", line)
ValueError: ('Missing distribution spec', '==')

Storing debug log for failure in C:\Users\PB\pip\pip.log

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如何解决安装twain的问题？

您可以从

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通过手动安装，我下载了

twain-1.0.4-py3-source.zip

并在cmd中运行此命令：

python setup.py install

给出了错误

文件“setup.py”，第4行，您可以尝试下载“twain-1.0.4-cp34-none-win32.whl”，并使用pip进行安装，如“C:\Python34\Scripts>pip install twain-1.0.4-cp34-none-win32.whl”