when I used find(target,'') #empty string it returned zero(0) but when I applied it(empty str) to subStringMatchExact I kinda run into infinite loop.is there anyway to fix that bug?

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anonymous · Answer

try an assert statement maybe add a try/except block in the function and return none if it gets passd an empty string http://pastebin.com/wHDiLA36 http://docs.python.org/tutorial/errors.html#exceptions http://docs.python.org/reference/simple_stmts.html#the-assert-statement http://docs.python.org/reference/compound_stmts.html#the-try-statement