在 Windows 上的 os.system 中转义双引号

Question

我想在程序名称和参数中转义 '"' 和所有其他通配符，所以我尝试双引号它们。我可以在 cmd.exe 中执行此操作

C:\bay\test\go>"test.py" "a" "b"  "c"
hello
['C:\\bay\\test\\go\\test.py', 'a', 'b', 'c']

但是以下使用 os.sytem 的代码有什么问题？

cmd = '"test.py" "a" "b" "c"'
print cmd
os.system(cmd)

它的输出：

C:\bay\test\go>test2.py
"test.py" "a" "b" "c"
'test.py" "a" "b" "c' is not recognized as an internal or external command,
operable program or batch file.

为什么整个字符串 '"test.py" "a" "b" "c"' 被识别为单个命令？但下面的例子不是：

cmd = 'test.py a b c'
print cmd
os.system(cmd)

C:\bay\test\go>test2.py
test.py a b c
hello
['C:\\bay\\test\\go\\test.py', 'a', 'b', 'c']

谢谢！

Answer 1

进一步谷歌来到这个页面

http://ss64.com/nt/syntax-esc.html

To launch a batch script which itself requires "quotes" 
CMD /k ""c:\batch files\test.cmd" "Parameter 1 with space" "Parameter2 with space"" 

cmd = '""test.py" "a" "b" "c""' 确实有效！