Re: local variable 'juveniles' referenced before assignment

Path	csiph.com!fu-berlin.de!uni-berlin.de!not-for-mail
From	Chris Angelico <rosuav@gmail.com>
Newsgroups	comp.lang.python
Subject	Re: local variable 'juveniles' referenced before assignment
Date	Thu, 14 Jan 2016 00:05:15 +1100
Lines	34
Message-ID	<mailman.101.1452690317.13488.python-list@python.org> (permalink)
References	<d668ec4e-509e-48a4-9be5-017077629c6c@googlegroups.com> <mailman.99.1452688353.13488.python-list@python.org> <5b66e2de-bc73-4200-a9c1-645d2e3f0467@googlegroups.com>
Mime-Version	1.0
Content-Type	text/plain; charset=UTF-8
X-Trace	news.uni-berlin.de ASRNQtdmf0RCYgkwmLqXXwSrTfe7z0Lfd1M+QoOFdLkA==
Return-Path	<rosuav@gmail.com>
X-Original-To	python-list@python.org
Delivered-To	python-list@mail.python.org
X-Spam-Status	OK 0.001
X-Spam-Evidence	'H': 1.00; 'S': 0.00; 'elif': 0.04; "subject:' ": 0.07; 'wednesday,': 0.07; 'works.': 0.07; 'cc:addr:python-list': 0.09; 'assigning': 0.09; 'option:': 0.09; 'jan': 0.11; 'def': 0.13; 'wed,': 0.15; 'variables': 0.15; '2016': 0.16; 'from:addr:rosuav': 0.16; 'from:name:chris angelico': 0.16; 'iteration.': 0.16; 'quite.': 0.16; 'received:io': 0.16; 'received:psf.io': 0.16; 'run.': 0.16; 'subject:variable': 0.16; 'utc,': 0.16; 'wrote:': 0.16; 'cc:2**0': 0.20; 'cc:addr:python.org': 0.20; 'names.': 0.22; 'simpler': 0.22; 'select': 0.23; 'header:In-Reply-To:1': 0.24; 'chris': 0.26; 'message-id:@mail.gmail.com': 0.27; 'values': 0.28; '13,': 0.29; 'alan': 0.29; 'print': 0.30; 'creating': 0.30; 'code': 0.30; 'call.': 0.30; 'option': 0.31; 'run': 0.33; 'instead,': 0.33; 'skip:j 20': 0.33; 'received:google.com': 0.35; 'set.': 0.35; 'skip:p 30': 0.35; 'instead': 0.36; 'received:209.85': 0.36; 'pm,': 0.36; 'subject:: ': 0.37; 'thanks': 0.37; 'received:209.85.213': 0.37; 'january': 0.38; 'received:209': 0.38; 'names': 0.38; 'sure': 0.39; 'your': 0.60; "you'll": 0.61; "'while'": 0.84; 'chrisa': 0.84; 'subject:before': 0.84; 'to:none': 0.91
DKIM-Signature	v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:cc :content-type; bh=snllfPfiUTQn5CFyKruQ1Zpz7t3ouOA5mX2tfPdlp8c=; b=U1YvKwGayIaJeoJnv+Kyr3qrCGiozmzedoXy7ybV8OcUGVNG8IJhiukKagwJFyszD2 viYOZGfBuoS0XPXszcAvu0I3iDr9J8aAc0AF70ZP/8KvKXYYVqW9BPfhMfbwr2EWHY6m evRS4DZCdkn3cVHOPTlQDnlfQR/T/q0tRYoQxM8uCQqHVOLHPBI6xnjE/Rbo+Zhhy60r P7jW17Y91jOV4fXThm88z6e1laLPgdcPD0Ev9taI1oSBuA3JPx3zs1Shw4wy2tY/zZB2 Aff27zpVVYt1FJaLdbrroi/w0Mauf0RBbgxRvaJYrRW7huRDuZ+EhqG43lZTgprnO17V TAQA==
X-Google-DKIM-Signature	v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:mime-version:in-reply-to:references:date :message-id:subject:from:cc:content-type; bh=snllfPfiUTQn5CFyKruQ1Zpz7t3ouOA5mX2tfPdlp8c=; b=fnO15PiI/U5RyGLb1IyoGikVF2KU/zEosjruEiAhzxOQq46BRwn9hS+4sS/fSuFnzx 2hSU2uI2K9AW8hoQf21twCDwYm+TYuY2vvFbOdADBOD9Jz1b5f6YQUgRkcA2z9UTMrE8 3nkZM7p81AhtDozu19OcGN+0amgiO4bDxRCEQSUAGW1/lu8KtFYS+Pj9gmKc31dMuli3 lMwDwfI6HORWlEKiR3bkbxY7h+QUnsmrCRDhvJuTQ+uOMpPHSxRP6+dGADY8GK9rnZPj g20yy1V4JddnzNAY4Z/ulXDQX70hiYVFSWr92RiGDPYLY5mE2wRbet47p8FmYj44dpP0 dCgg==
X-Gm-Message-State	ALoCoQkzTq+GplA0bfX61k2ZCufarQ+hIoOCCRLOQ8j0Ov/nCKhu723/uUwAfsVob8YLu6pxY9ql3iimBW7iYYyKHnim9DfYuA==
X-Received	by 10.50.111.169 with SMTP id ij9mr24025186igb.92.1452690315320; Wed, 13 Jan 2016 05:05:15 -0800 (PST)
In-Reply-To	<5b66e2de-bc73-4200-a9c1-645d2e3f0467@googlegroups.com>
X-BeenThere	python-list@python.org
X-Mailman-Version	2.1.20+
Precedence	list
List-Id	General discussion list for the Python programming language <python-list.python.org>
List-Unsubscribe	<https://mail.python.org/mailman/options/python-list>, <mailto:python-list-request@python.org?subject=unsubscribe>
List-Archive	<http://mail.python.org/pipermail/python-list/>
List-Post	<mailto:python-list@python.org>
List-Help	<mailto:python-list-request@python.org?subject=help>
List-Subscribe	<https://mail.python.org/mailman/listinfo/python-list>, <mailto:python-list-request@python.org?subject=subscribe>
Xref	csiph.com comp.lang.python:101609

Show key headers only | View raw

On Wed, Jan 13, 2016 at 11:54 PM, Alan Robinson
<arobinson@lordlawson.org.uk> wrote:
> On Wednesday, 13 January 2016 12:32:51 UTC, Chris Angelico  wrote:
>> On Wed, Jan 13, 2016 at 11:23 PM, Alan Robinson
>> <arobinson@lordlawson.org.uk> wrote:
>> > def menu():
>> >     option = int(input("Please select an option: \n 1: Set Generation 0 Values \n 2: View Generation 0 Values \n 3: Run Model \n 4: Print values"))
>> >
>> >     if option == 1:
>> >         juveniles,adults,seniles = setGen()
>> >     elif option == 2:
>> >         displayGen()
>> >     elif option == 3:
>> >         runModel(juveniles,adults,seniles)
>> >     elif option == 4:
>> >         print(juveniles,adults,seniles)
>> >     menu()
>> >
>>
>> This is a classic use of recursion instead of iteration. When you call
>> menu() again, you're creating a completely new 'slot' for the new
>> function; it has its own set of names. Assigning to names in one call
>> of menu() has no effect on any other call.
>>
>> Instead, look into the way a while loop works. You'll find that your
>> code is simpler and clearer, plus your variables will stay set.
>>
>> ChrisA
> thanks I need the menu to run again not sure how to do that though

Not quite. You don't want the menu to run again; you want it to
continue to run. Look up the 'while' loop and what it does.

ChrisA

Thread

local variable 'juveniles' referenced before assignment Alan Robinson <arobinson@lordlawson.org.uk> - 2016-01-13 04:23 -0800
  Re: local variable 'juveniles' referenced before assignment Chris Angelico <rosuav@gmail.com> - 2016-01-13 23:32 +1100
    Re: local variable 'juveniles' referenced before assignment Alan Robinson <arobinson@lordlawson.org.uk> - 2016-01-13 04:54 -0800
      Re: local variable 'juveniles' referenced before assignment Chris Angelico <rosuav@gmail.com> - 2016-01-14 00:05 +1100
      Re: local variable 'juveniles' referenced before assignment Peter Otten <__peter__@web.de> - 2016-01-13 14:05 +0100
        Re: local variable 'juveniles' referenced before assignment Alan Robinson <arobinson@lordlawson.org.uk> - 2016-01-13 05:22 -0800
          Re: local variable 'juveniles' referenced before assignment Alan Robinson <arobinson@lordlawson.org.uk> - 2016-01-13 05:26 -0800

csiph-web