How to redirect input in debugger?

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I can run my program from command line and pass in input from a file, e.g.

python ./test_program.py < sound\sound.i0

How can I do the equivalent in the wing IDE so I can take advantage of the debugger and breakpoints?

I've tried setting the debug preferences to "use external console" and not "use sys.stdin Wrapper" but when I try to pass in arguments "< sound\sound.i0" via "Use Project Settings and the Following Run Args", the input file is not read in - the program just seems to hang on a line such as

nmc = input().split()

I suppose this is because it is not getting any input from my argument "< sound\sound.i0"

I've figured out that if I cut and paste lines into the I/O window at the right time, the input it parsed properly, but since my input file is 100s or 1000s of lines this is not practical.