randrange loops

[luislupe at gmail.com]

On 15 Jun, 21:05, "Terry Reedy" <tjre... at udel.edu> wrote:
> <luisl... at gmail.com> wrote in message
>
> news:6e424f2a-872d-4dd1-b28d-cf2a985895c9 at j22g2000hsf.googlegroups.com...
> | Hi,
> |
> |
> | I've created a method where the script defines twenty variables and
> | several of them should be random having a maximum and a minimum value.
> |
> | What I did was this:
> |
> | from random import randrange as rr, random
> |
> | self.tr2_vezes = self.rr(self.d_tr2_vezes[0],self.d_tr2_vezes[-1],
> | 1)     # just an example, others are similar
>
> Are we to presume that self.rr is rr?
>
> | The minimum and maximum limits are never lower than -50 and higher
> | than 250 and are integer.
> |
> | Many times, not always, the problem is that the script just loops
> | forever and no value is chosen for the variable.
> |
> | What's happening here?  What am I doing wrong?
>
> On what line does it 'loop forever'?
> Are you saying that the same code with same input sometimes works and
> sometimes does not?  In any case, try to reduce it to the minumum that
> either always or sometimes fails.  And post that.
>
> tjr


I tried to reproduce the error in a small script.   Python's error
message always returned this kind of error:

Traceback (most recent call last):
  File "individuo.py", line 584, in <module>
    ind.criarAleatorio()
  File "individuo.py", line 247, in criarAleatorio
    self.criarTr2_vezes()
  File "individuo.py", line 185, in criarTr2_vezes
    self.tr2_vezes = self.rr(self.d_tr2_vezes[0],self.d_tr2_vezes[-1],
1)
  File "/usr/lib/python2.5/random.py", line 158, in randrange
    istart = int(start)
KeyboardInterrupt

I got mislead by this.  The loop was about a while statement that
compared values from two of the random variables.  It was a '>=' and
it should be a '>'.

Thank you for your messages.


Luis