#19683: A minor mistake?
-------------------------------+------------------------------------
     Reporter:  sunsongxp@…    |                    Owner:  nobody
         Type:  Bug            |                   Status:  new
    Component:  Documentation  |                  Version:  1.4
     Severity:  Normal         |               Resolution:
     Keywords:  signing        |             Triage Stage:  Accepted
    Has patch:  0              |      Needs documentation:  0
  Needs tests:  0              |  Patch needs improvement:  0
Easy pickings:  0              |                    UI/UX:  0
-------------------------------+------------------------------------
Changes (by aaugustin):

 * needs_better_patch:   => 0
 * needs_tests:   => 0
 * needs_docs:   => 0
 * type:  Uncategorized => Bug
 * stage:  Unreviewed => Accepted


Old description:

> https://docs.djangoproject.com/en/1.4/topics/signing/
>
> In this page, which is about signing, enumerates several examples about
> how to use it. When it comes to that handling Exception, to be specific,
>
> >>> value += 'm'
> >>> try:
> ...    original = signer.unsign(value)
> ... except signing.BadSignature:
> ...    print "Tampering detected!"
>
> I found that these lines failed, the error shows signing.BadSignature is
> not defined, I tested a while, and then I knew,
>
> from django.core import signing
>
> is required. The example miss that. I don't know if that count as a
> mistake. Besides, the information about previous line is so scarce in
> reference, do I need to check the source code?

New description:

 https://docs.djangoproject.com/en/1.4/topics/signing/

 In this page, which is about signing, enumerates several examples about
 how to use it. When it comes to that handling Exception, to be specific,

 {{{
 >>> value += 'm'
 >>> try:
 ...    original = signer.unsign(value)
 ... except signing.BadSignature:
 ...    print "Tampering detected!"
 }}}

 I found that these lines failed, the error shows signing.BadSignature is
 not defined, I tested a while, and then I knew,

 {{{
 from django.core import signing
 }}}

 is required. The example miss that. I don't know if that count as a
 mistake. Besides, the information about previous line is so scarce in
 reference, do I need to check the source code?

--

Comment:

 Yes -- it's a good practice to include relevant imports in code samples.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/19683#comment:1>
Django <https://code.djangoproject.com/>
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