Indentation and optional delimiters

[wolfram.hinderer at googlemail.com]

On 26 Feb., 14:36, bearophileH... at lycos.com wrote:
> A possible solution to this problem is "optional delimiters". What's
> the path of less resistance to implement such "optional delimiters"?
> Is to use comments. For example: #} or #: or something similar.
> If you use such pairs of symbols in a systematic way, you have cheap
> "optional delimiters", for example:
>
> def insort_right(a, x, lo=0, hi=None):
>     if hi is None:
>         hi = len(a)
>     #}
>     while lo < hi:
>         mid = (lo + hi) // 2
>         if x < a[mid]:
>             hi = mid
>         #}
>         else:
>             lo = mid+1
>         #}
>     #}
>     a.insert(lo, x)
> #}
>
> It looks a bit ugly, but a script is able to take such code even
> flattened:
>
> def insort_right(a, x, lo=0, hi=None):
> if hi is None:
> hi = len(a)
> #}
> while lo < hi:
> mid = (lo + hi) // 2
> if x < a[mid]:
> hi = mid
> #}
> else:
> lo = mid+1
> #}
> #}
> a.insert(lo, x)
> #}
>
> And build the original Python code (it's possible to do the opposite
> too, but it requires a bit more complex script).

Have a look at Tools/Scripts/pindent.py

--
Wolfram