[Tutor] Loop in pre-defined blocks

[Michael Selik]

On Mon, Jun 13, 2016 at 6:28 PM Alan Gauld via Tutor <tutor at python.org>
wrote:

> On 13/06/16 08:46, Ek Esawi wrote:
> > Here is a beginner code that might work for you. Best of luck.   EK
> >
> > b=[12, 20, 35]
> >
> > for i in range(len(b)):
> >      if i==0:
> >           c=0
> >      else:
> >           c=b[i-1]
> >      for j in range(c, b[i]):
> >           print(i+1,j+1)
>
> The problem here is that it doesn't give the gaps in the output
> data that the OP requested. That's why we said they need the start
> and stop values in the ranges.
>

My apologies. The good news is that makes the solution even easier.

    py> blocks=[(2,4), (10,13), (20,22)]
    py> for i, (start, stop) in enumerate(blocks):
    ...     for j in range(start, stop):
    ...             print(i, j)
    ...
    0 2
    0 3
    1 10
    1 11
    1 12
    2 20
    2 21