Windows 上 os.system 中的双引号转义
我想转义程序名称和参数中的 '"' 和所有其他通配符，因此我尝试对它们加双引号。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']
但使用 os.sytem 的以下代码有什么问题？
cmd = '"test.py" "a" "b" "c"'
print cmd
os.system(cmd)
其输出：
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？但下面的示例不是：
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！
I want to escape '"' and all other wild chars in program name and arguments, so I try to double quote them. and I can do this in cmd.exe
C:\bay\test\go>"test.py" "a" "b" "c"
hello
['C:\\bay\\test\\go\\test.py', 'a', 'b', 'c']
but what's wrong with the following code using os.sytem?
cmd = '"test.py" "a" "b" "c"'
print cmd
os.system(cmd)
its output:
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.
Why is the whole string '"test.py" "a" "b" "c"' recognized as a single command? But the following example isn't:
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']
Thanks!
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进一步谷歌来到这个页面
http://ss64.com/nt/syntax-esc.html
cmd = '""test.py" "a" "b" "c""'确实有效！Furthing google comes this page
http://ss64.com/nt/syntax-esc.html
cmd = '""test.py" "a" "b" "c""'does work!实际上，它只是作为设计起作用。
你不能那样使用 os.system 。看这个：
http://mail.python.org/pipermail/ python-bugs-list/2000-July/000946.html
Actually, it just work as design.
You can NOT use os.system like that. See this:
http://mail.python.org/pipermail/python-bugs-list/2000-July/000946.html
尝试使用 os.system('python "test.py" "a" "b" "c"')
您也可以使用 subprocess 模块来实现这种目的，
请看一下 这个线程
更新：当我这样做时，
os.system('"test.py" "a" "b" "c"')，我得到了类似的错误，但不是在 os.system('test.py "a" "b" "c"') 上，所以，我喜欢假设第一个参数不应该用双引号引起来Try with
os.system('python "test.py" "a" "b" "c"')You can also use subprocess module for that kind of purpose,
please take a look this thread
UPDATE:When I do,
os.system('"test.py" "a" "b" "c"'), I got similar errors, but not onos.system('test.py "a" "b" "c"'), So, I like to assume that first parameter should not be double-quoted将参数括在括号中，它可以工作。
Enclose the arguments in brackets, it works.