Re: Error: 'module' object is not callable

On Fri, Apr 27, 2012 at 4:03 PM, bruno desthuilliers
<bruno.desthuilliers@gmail.com> wrote:
> On Apr 27, 2:30 pm, Tom Evans <tevans...@googlemail.com> wrote:
>>
>> The datetime class lives inside the datetime module.
>
> So far so good.... but!
>
>> You must have
>> "import datetime" in that code, perhaps as well as "from datetime
>> import datetime".
>
> The first statement will import the datetime module and bind it to the
> name "datetime" in the current namespace. The second will import the
> datetime class from the datetime module and bind it to the name
> "datetime" in thye current namespace, _in this cas overwriting the
> first binding. IOW : you either use the first form and access the
> datetime class as "datetime.datetime", or use the second form and
> access the datetime class as "datetime", but using both forms is at
> once useless and confusing.
>
> As far as I'm concerned, I strongly favor the first form (importing
> the module and using the fully qualified name), since there are other
> useful stuff in the datetime module and chances are you'll need them
> if you need the (badly named) datetime.datetime class.
>

What I was trying to say is that he probably has code like this in
(eg) app.views:

from datetime import datetime
from app.models import *

and therefore thinks that he is using the datetime class, not the
module. However, if app.models doesn't specify the symbols it exports,
and has this in it:

import datetime

then the variable 'datetime' in app.views will be bound to the module,
not the class.

A similar bug is importing twice in the same file:

from datetime import datetime
....
import datetime

Cheers

Tom

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