Re: Question about dot notation syntax (Django source)

2018-02-23 Thread drone4four 


Hi Andreas!

Thank you for your reply.

You said:


The dot notation (as you call it) references a class that you can find if 
> you look in the django package, under folder contrib, folder auth, file 
> password_validation.py you will find a class class 
> UserAttributeSimilarityValidator. See the "dots" as directories / files 
> (they are modules).


So when a Django script (settings.py for example) is called and the 
libraries are imported at the top of the script (or in my example above, 
when the `AUTH_PASSWORD_VALIDATORS` variable is declared) it looks inside 
`site-packages` (inside my virtual environment) for the `django` directory, 
then for the `auth` directory which contains the `password_validation.py` 
module. settings.py refers to four classes inside the password_validation 
script:

   - 
   
   UserAttributeSimilarityValidator
   - 
   
   MinimumLengthValidator
   - 
   
   CommonPasswordValidaor
   - 
   
   NumericPasswordValidator
   

Therefore, and more to your point, Andreas: The 
`django.contrib.auth.password_validation.UserAttributeSimilarityValidator` 
pattern here translated into pseudocode might reflect this: 
`DjangoDirectory.ContribDirectory.AuthDirectory.ThisModule.ThisClass`. 

This structure applies also when a programmer imports his or her functions 
at the top of any Python script.  To distinguish references to directories, 
modules, and classes in an import statement, the programmer just has to 
know their filesystem and their code, right?

Andreas: I meant to follow up here sooner.  Sorry for the delay.  Here it 
is.  


On Friday, February 16, 2018 at 3:35:34 AM UTC-5, Andréas Kühne wrote:
>
> Like Juan says,
>
> Read the documentation for modules and dictionaries and I think you will 
> be better off. However, here is a quick rundown of your questions:
>
> AUTH_PASSWORD_VALIDATORS = [
> {
> 'NAME': 
> 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator'
> ,
> },
>
> {
> 'NAME': 
> 'django.contrib.auth.password_validation.MinimumLengthValidator',
> },
>
> {
> 'NAME': 
> 'django.contrib.auth.password_validation.CommonPasswordValidator',
> },
>
> {
> 'NAME': 
> 'django.contrib.auth.password_validation.NumericPasswordValidator',
> },
> ]
>
>
>
> 1. The first item in the list is the first dictionary that is present. A 
> dictionary in Python starts with a { and ends with a }. So the first item 
> is:
> {
> 'NAME': 
> 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator'
> ,
> },
>
> The AUTH_PASSWORD_VALIDATORS is a list of dictionaries with only one key 
> ("NAME") and one item in them. So this is the first item and therefore the 
> first validator in this case.
>
> 2. Your assumption on dictionaries is wrong because "NAME" is not the 
> dictionary, but rather a KEY IN a dictionary (the entire first dictionary 
> is under bullet point 1 here).
>
> 3. The dot notation (as you call it) references a class that you can find 
> if you look in the django package, under folder contrib, folder auth, file 
> password_validation.py you will find a class class 
> UserAttributeSimilarityValidator. See the "dots" as directories / files 
> (they are modules). 
>
> So there is really not that much to explain here - it is probably simpler 
> than you expect it to be :-)
>
> Regards,
>
> Andréas
>
> 2018-02-16 5:09 GMT+01:00 Juan Pablo Romero Bernal  >:
>
>> Hi, 
>>
>> You must read: https://docs.python.org/3/tutorial/modules.html
>>
>> and
>>
>> https://docs.python.org/3/tutorial/datastructures.html#dictionaries
>>
>> Cheers, 
>>
>>
>> On Thu, Feb 15, 2018 at 8:06 PM, drone4four > > wrote:
>>
>>> In, “Password management in Django 
>>> ”,
>>>  
>>> it explains that this particular doc is for advanced users, like Django 
>>> admins who need to choose different hashing algorithms.  So it’s not really 
>>> necessary for a beginner user like me to understand.  From the doc:
>>>
>>> ...depending on your requirements, you may choose a different algorithm, 
 or even use a custom algorithm to match your specific security situation. 
 Again, most users shouldn’t need to do this – if you’re not sure, you 
 probably don’t. If you do, please read on...
>>>
>>>
>>> I don’t. So I don’t need to continue reading. 
>>>
>>> But I do have some questions about dot notation in general as some code 
>>> appears in settings.py. Lines 87 - 100 in this file appear as follows:
>>>
>>> AUTH_PASSWORD_VALIDATORS = [
>>> {
>>> 'NAME': 
>>> 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator'
>>> ,
>>> },
>>>
>>> {
>>> 'NAME': 
>>> 'django.contrib.auth.password_validation.MinimumLengthValidator',
>>> },
>>>
>>> {
>>> 'NAME': 
>>>

Re: Question about dot notation syntax (Django source)

2018-02-16 Thread Andréas Kühne 
Like Juan says,

Read the documentation for modules and dictionaries and I think you will be
better off. However, here is a quick rundown of your questions:

AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 'django.contrib.auth.password_validation.
UserAttributeSimilarityValidator',
},

{
'NAME': 'django.contrib.auth.password_validation.
MinimumLengthValidator',
},

{
'NAME': 'django.contrib.auth.password_validation.
CommonPasswordValidator',
},

{
'NAME': 'django.contrib.auth.password_validation.
NumericPasswordValidator',
},
]



1. The first item in the list is the first dictionary that is present. A
dictionary in Python starts with a { and ends with a }. So the first item
is:
{
'NAME': 'django.contrib.auth.password_validation.
UserAttributeSimilarityValidator',
},

The AUTH_PASSWORD_VALIDATORS is a list of dictionaries with only one key
("NAME") and one item in them. So this is the first item and therefore the
first validator in this case.

2. Your assumption on dictionaries is wrong because "NAME" is not the
dictionary, but rather a KEY IN a dictionary (the entire first dictionary
is under bullet point 1 here).

3. The dot notation (as you call it) references a class that you can find
if you look in the django package, under folder contrib, folder auth, file
password_validation.py you will find a class class
UserAttributeSimilarityValidator. See the "dots" as directories / files
(they are modules).

So there is really not that much to explain here - it is probably simpler
than you expect it to be :-)

Regards,

Andréas

2018-02-16 5:09 GMT+01:00 Juan Pablo Romero Bernal 
:

> Hi,
>
> You must read: https://docs.python.org/3/tutorial/modules.html
>
> and
>
> https://docs.python.org/3/tutorial/datastructures.html#dictionaries
>
> Cheers,
>
>
> On Thu, Feb 15, 2018 at 8:06 PM, drone4four  wrote:
>
>> In, “Password management in Django
>> ”,
>> it explains that this particular doc is for advanced users, like Django
>> admins who need to choose different hashing algorithms.  So it’s not really
>> necessary for a beginner user like me to understand.  From the doc:
>>
>> ...depending on your requirements, you may choose a different algorithm,
>>> or even use a custom algorithm to match your specific security situation.
>>> Again, most users shouldn’t need to do this – if you’re not sure, you
>>> probably don’t. If you do, please read on...
>>
>>
>> I don’t. So I don’t need to continue reading.
>>
>> But I do have some questions about dot notation in general as some code
>> appears in settings.py. Lines 87 - 100 in this file appear as follows:
>>
>> AUTH_PASSWORD_VALIDATORS = [
>> {
>> 'NAME': 'django.contrib.auth.password_
>> validation.UserAttributeSimilarityValidator',
>> },
>>
>> {
>> 'NAME': 'django.contrib.auth.password_
>> validation.MinimumLengthValidator',
>> },
>>
>> {
>> 'NAME': 'django.contrib.auth.password_
>> validation.CommonPasswordValidator',
>> },
>>
>> {
>> 'NAME': 'django.contrib.auth.password_
>> validation.NumericPasswordValidator',
>> },
>> ]
>>
>>
>>
>> Can someone please identify the first item in this list?  I understand
>> that all the items in this list are dictionaries.  The first dictionary is
>> named, ‘NAME’.  The key involves libraries, functions, variables, class
>> names and more functions.  Which is which? Is `django` the library? What is
>> `contrib`? Is this a function name or a class name?  If `contrib` is a
>> function name or class name, where is it located in my venv or Django
>> project folder?
>>
>> What does each word in the dictionary mean or refer to?  Can some one
>> please explain the syntax?
>>
>> Thanks for your attention.
>>
>> --
>> You received this message because you are subscribed to the Google Groups
>> "Django users" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to django-users+unsubscr...@googlegroups.com.
>> To post to this group, send email to django-users@googlegroups.com.
>> Visit this group at https://groups.google.com/group/django-users.
>> To view this discussion on the web visit https://groups.google.com/d/ms
>> gid/django-users/e285f69d-3aad-4d99-b46e-7f6be5ccbffb%40googlegroups.com
>> 
>> .
>> For more options, visit https://groups.google.com/d/optout.
>>
>
>
>
> --
> Juan
>
> --
> You received this message because you are subscribed to the Google Groups
> "Django users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to django-users+unsubscr...@googlegroups.com.
> To post to this group, send email to django-users@googlegroups.com.
> Visit this group at

Re: Question about dot notation syntax (Django source)

2018-02-15 Thread Juan Pablo Romero Bernal 
Hi,

You must read: https://docs.python.org/3/tutorial/modules.html

and

https://docs.python.org/3/tutorial/datastructures.html#dictionaries

Cheers,


On Thu, Feb 15, 2018 at 8:06 PM, drone4four  wrote:

> In, “Password management in Django
> ”,
> it explains that this particular doc is for advanced users, like Django
> admins who need to choose different hashing algorithms.  So it’s not really
> necessary for a beginner user like me to understand.  From the doc:
>
> ...depending on your requirements, you may choose a different algorithm,
>> or even use a custom algorithm to match your specific security situation.
>> Again, most users shouldn’t need to do this – if you’re not sure, you
>> probably don’t. If you do, please read on...
>
>
> I don’t. So I don’t need to continue reading.
>
> But I do have some questions about dot notation in general as some code
> appears in settings.py. Lines 87 - 100 in this file appear as follows:
>
> AUTH_PASSWORD_VALIDATORS = [
> {
> 'NAME': 'django.contrib.auth.password_validation.
> UserAttributeSimilarityValidator',
> },
>
> {
> 'NAME': 'django.contrib.auth.password_validation.
> MinimumLengthValidator',
> },
>
> {
> 'NAME': 'django.contrib.auth.password_validation.
> CommonPasswordValidator',
> },
>
> {
> 'NAME': 'django.contrib.auth.password_validation.
> NumericPasswordValidator',
> },
> ]
>
>
>
> Can someone please identify the first item in this list?  I understand
> that all the items in this list are dictionaries.  The first dictionary is
> named, ‘NAME’.  The key involves libraries, functions, variables, class
> names and more functions.  Which is which? Is `django` the library? What is
> `contrib`? Is this a function name or a class name?  If `contrib` is a
> function name or class name, where is it located in my venv or Django
> project folder?
>
> What does each word in the dictionary mean or refer to?  Can some one
> please explain the syntax?
>
> Thanks for your attention.
>
> --
> You received this message because you are subscribed to the Google Groups
> "Django users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to django-users+unsubscr...@googlegroups.com.
> To post to this group, send email to django-users@googlegroups.com.
> Visit this group at https://groups.google.com/group/django-users.
> To view this discussion on the web visit https://groups.google.com/d/
> msgid/django-users/e285f69d-3aad-4d99-b46e-7f6be5ccbffb%40googlegroups.com
> 
> .
> For more options, visit https://groups.google.com/d/optout.
>



-- 
Juan

-- 
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to django-users+unsubscr...@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/CAJK1Jg26MJz2xHYQyH7EdH44EmoUNcdW1D%2BMOfGtmeq4yr8Z9A%40mail.gmail.com.
For more options, visit https://groups.google.com/d/optout.

Question about dot notation syntax (Django source)

2018-02-15 Thread drone4four 


In, “Password management in Django 
”,
 
it explains that this particular doc is for advanced users, like Django 
admins who need to choose different hashing algorithms.  So it’s not really 
necessary for a beginner user like me to understand.  From the doc:

...depending on your requirements, you may choose a different algorithm, or 
> even use a custom algorithm to match your specific security situation. 
> Again, most users shouldn’t need to do this – if you’re not sure, you 
> probably don’t. If you do, please read on...


I don’t. So I don’t need to continue reading. 

But I do have some questions about dot notation in general as some code 
appears in settings.py. Lines 87 - 100 in this file appear as follows:

AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 
'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},

{
'NAME': 
'django.contrib.auth.password_validation.MinimumLengthValidator',
},

{
'NAME': 
'django.contrib.auth.password_validation.CommonPasswordValidator',
},

{
'NAME': 
'django.contrib.auth.password_validation.NumericPasswordValidator',
},
]



Can someone please identify the first item in this list?  I understand that 
all the items in this list are dictionaries.  The first dictionary is 
named, ‘NAME’.  The key involves libraries, functions, variables, class 
names and more functions.  Which is which? Is `django` the library? What is 
`contrib`? Is this a function name or a class name?  If `contrib` is a 
function name or class name, where is it located in my venv or Django 
project folder? 

What does each word in the dictionary mean or refer to?  Can some one 
please explain the syntax?

Thanks for your attention.

-- 
You received this message because you are subscribed to the Google Groups 
"Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to django-users+unsubscr...@googlegroups.com.
To post to this group, send email to django-users@googlegroups.com.
Visit this group at https://groups.google.com/group/django-users.
To view this discussion on the web visit 
https://groups.google.com/d/msgid/django-users/e285f69d-3aad-4d99-b46e-7f6be5ccbffb%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.