Python .find() string method -

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i wondering if .find() string method in python. here example:

    word = 'banana'     index = word.find('a')     1#result     word.find('na')      2#result     word.find('na', 3)     4#result      name = 'bob'      name.find('b', 1, 2)      -1#result

could explain string method does? part word.find('na') , word.find('b',1,2), numbers , meaning of results happen when running these commands?? thank helping out!

in [1]: print str.find.__doc__ s.find(sub [,start [,end]]) -> int  return lowest index in s substring sub found, such sub contained within s[start:end].  optional arguments start , end interpreted in slice notation.  return -1 on failure.

google words in doc string don't understand, , have answer


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