Criteria
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Parse command and command suite;
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Help and Manual auto-creation;
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Deploy tools;
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Configuration tools;
Candidates
configglue in 2.7+: build-in package in 2.7.3
argparse in 2.7+: build-in package in 2.7.3
docopt
cli
curses: help to implement incremental search
Ref: Creating python command line applications with docopt