python - optparse: Support additional prefixes on integer arguments? -

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optparse supports '0b', '0' , '0x' prefixes on integer arguments signify binary, octal , hexadecimal respectively. need support additional prefixes, including '%' binary , '$' hex.

one way patch optparse._parse_num, follows:

oldparsenum = optparse._parse_num def newparsenum(val, type):     val = re.sub('^%', '0b', val)     val = re.sub('^\$', '0x', val)     return oldparsenum(val, type) optparse._parse_num = newparsenum

although work, seems quite fragile. there better approach?

you define own option-handler/-callback:

parser.add_option("-c", action="callback", callback=my_callback)

to handle special cases or extend syntax.

take documentation determine if sufficient , better (monkey-)patching.


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