Basic Python help
mikael petterson
mikaelpetterson1 at gmail.com
Fri Oct 23 08:09:10 EDT 2020
fredag 23 oktober 2020 kl. 13:22:55 UTC+2 skrev Frank Millman:
> On 2020-10-23 12:41 PM, mikael petterson wrote:
> > Hi,
> >
> > I need to use the following code but in java.
> >
> > END_DELIM = '\n##\n'
> > def start_delim(data_len): return '\n#%s\n' % (data_len)
> > data = "%s%s%s" % (start_delim(len(data)), data, END_DELIM)
> >
> > Can anyone help me to understand what it means:
> >
> > I am guessing now:
> >
> > a function defined "start_delim" takes the length of a data string.
> > function does modulo on something. This something I am not sure of
> > :-)
> > Does '\n#%s\n' will this be evaluated to a number when %s i replaced with data_len?
> >
> > Then the result is used as one parameter in "%s%s%s"
> > start_delim then for the other
> > data
> > END_DELIM
> >
> I think it is simpler than that.
>
> >>>
> >>> '\n#%s\n' % 2
> '\n#2\n'
> >>>
>
> All it is doing is replacing '%s' with the length of the string.
>
> So the result is the concatenation of -
>
> 1. '\n' + '#' + length of string + '\n' as the start delimiter
>
> 2. the string itself
>
> 3. '\n' + '#' + '#' + '\n' as the end delimiter
>
> Frank Millman
Yes that was simpler than I thought. Thanks a lot!
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