In message <ib0kor01...@news5.newsguy.com>, Chris Torek wrote:

>     ['/bin/sh', '-c', 'echo', '$MYVAR']
> 
> (with arguments expressed as a Python list).  /bin/sh takes the
> string after '-c' as a command, and the remaining argument(s) if
> any are assigned to positional parameters ($0, $1, etc).

Doesn’t work. I don’t know what happens to the extra arguments, but they 
just seem to be ignored if -c is specified.

    sh -c 'echo hi'

echoes “hi”, while

    sh -c echo hi

just outputs a blank line.
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