2013/3/13 Jiewei Huang <jiewe...@gmail.com>:
> Hi all,
>
> I'm currently stuck at this question on
>
> Writing a function len_str that takes a string as an argument and returns a
> pair consisting of the length of the string and the string itself.
>
> Example: len_str('Meaning of life') should return the tuple (15, 'Meaning of
> life').
>
>
> I can only think of this :
>
> len_str = ('welcome to life' )
>
> print (len(len_str,), len_str)
>
>
> However that not an correct answer I need to make a def len_str but I can't
> seen to get it right.
> --
> http://mail.python.org/mailman/listinfo/python-list
Hi,
unless you are required to code the length-counting by hand as a part
of the exercise, you would simply use the built-in function for that,
i.e.
http://docs.python.org/3.3/library/functions.html#len
Tuples are created using the coma delimiter; optionally with enclosing parens.
http://docs.python.org/3.3/library/stdtypes.html#tuples
>>> input_string = "Meaning of life"
>>> input_string
'Meaning of life'
>>> len(input_string)
15
>>> (len(input_string), input_string)
(15, 'Meaning of life')
>>>
Now you have to put the needed code to the function body; see
http://docs.python.org/3.3/tutorial/controlflow.html#defining-functions
(Be sure not to forget the "return" statement containing the result of
your function.)
hth,
vbr
--
http://mail.python.org/mailman/listinfo/python-list
