Re: [Matplotlib-users] dates for x-axis

[questions a. <que...@gm...>]

thanks for all the responses. still finding it very confusing!! but got it
to work (without having to import in the loop).
I used:
from datetime import datetime as dt

but I also had to call:
from datetime import timedelta

and now it seems to work nicely. thank you


On Fri, Apr 20, 2012 at 3:36 AM, Benjamin Root <ben...@ou...> wrote:

>
>
> On Thu, Apr 19, 2012 at 1:21 PM, Goyo <goy...@gm...> wrote:
>
>> El día 19 de abril de 2012 05:31, questions anon
>> <que...@gm...> escribió:
>> > Thank you, I was able to get it to work but only if I imported datetime
>> > within the loop, otherwise I ended up with the
>> > AttributeError: type object 'datetime.datetime' has no attribute
>> 'datetime'
>> > and if I added 'import datetime' at the top of my script it had an error
>> > where I loop through combining each month
>> > "    stop_month = datetime(2011, 03, 01)
>> > TypeError: 'module' object is not callable"
>>
>> If you can write a standalone, minimal executable script which
>> reproduces the problem I'll take a look. Send it as an attachement and
>> add sample data files if necessary.
>>
>> Goyo
>>
>>
> The issue is that there is a slight mixup in namespaces.  There is a
> module called datetime, and that module contains a class object called
> datetime.  So, if your imports at the top are "import datetime", then all
> your module-related stuff need to be prepended with "datetime.". But, if
> your imports at the top are "from datetime import datetime", then you can
> use the object freely, but you can't use anything else from the module
> unless you also import it.
>
> Here is the tricky part.  In your code, you did the following:
>
> from datetime import datetime
>
> If you then did:
>
> import datetime
>
> depending on the order the two were, one would overwrite the other.  You
> can only have one thing called "datetime".  Personally, I would do one of
> two things:
>
> import datetime as dt
>
> and use "dt.datetime()" to create datetime objects as well as call
> functions like "dt.strftime()". Or, do
>
> from datetime import datetime, date, timedelta, strftime
>
> and get replace calls like "datetime.datetime()" and "datetime.strftime()"
> with just "datetime()" and "strftime()".
>
> I hope that clears things up.  Namespaces are a honking good idea, but
> having objects be the same exact name as a module gets confusing very
> easily.
>
> Cheers!
> Ben Root
>
>