Redirect subprocess stderr to stdout

user_35070 0
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I want to redirect the stderr output of a subprocess to stdout. The constant STDOUT should do that, shouldn't it?

However,

$ python >/dev/null -c 'import subprocess;\
                        subprocess.call(["ls", "/404"],stderr=subprocess.STDOUT)'

does output something. Why is that the case, and how do I get the error message on stdout?

stderr subprocess python
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