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A dateutil error has appeared, due to updates? How to fix?

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  A dateutil error has appeared, due to updates?  How to fix? tinnews@isbd.co.uk - 2012-09-23 11:24 +0100
    Re: A dateutil error has appeared, due to updates?  How to fix? Peter Otten <__peter__@web.de> - 2012-09-23 13:38 +0200
      Re: A dateutil error has appeared, due to updates?  How to fix? tinnews@isbd.co.uk - 2012-09-23 16:26 +0100

#29805 — A dateutil error has appeared, due to updates? How to fix?

I have a python script which uses the dateutil module with the
following:-

    import sys
    import datetime
    import icalendar
    from dateutil.relativedelta import relativedelta

The section of code which uses relativedelta is as follows:-

        #
        #
        # If the event is a repeating event with a start date in the
        # past then we add the repeat interval until we find the next
        # occurrence
        #
        if eventDate < datetime.date.today():
            if event.has_key('RRULE'):
                freq = event.decoded('RRULE')['FREQ'][0]
                if event.decoded('RRULE').has_key('INTERVAL'):
                    interval = event.decoded('RRULE')['INTERVAL'][0]
                else:
                    interval = 1;
                if 'WEEKLY' == freq:
                    delta = relativedelta(weeks=+interval)
                if 'MONTHLY' == freq:
                    delta = relativedelta(months=+interval)
                if 'YEARLY' == freq:
                    delta = relativedelta(years=+interval)
                while eventDate < datetime.date.today():
                    eventDate += delta
            else:
                continue        # if it's a non-repeating event in the past


It used to work and all I have done meanwhile is to update my xubuntu
system as fixes are released.  I'm now getting the error:-

    Traceback (most recent call last):
      File "/home/chris/bin/calics.py", line 62, in <module>
        eventDate += delta
      File "/usr/lib/python2.7/dist-packages/dateutil/relativedelta.py", line 261, in __radd__
        day = min(calendar.monthrange(year, month)[1],
    AttributeError: 'module' object has no attribute 'monthrange'

Have I lost a module somewhere in the updates or has something in
python changed such that my code no longer works as it used to?

Can anyone help diagnose this please.

-- 
Chris Green

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#29808

tinnews@isbd.co.uk wrote:

> I have a python script which uses the dateutil module with the
> following:-
> 
>     import sys
>     import datetime
>     import icalendar
>     from dateutil.relativedelta import relativedelta
> 
> The section of code which uses relativedelta is as follows:-
> 
>         #
>         #
>         # If the event is a repeating event with a start date in the
>         # past then we add the repeat interval until we find the next
>         # occurrence
>         #
>         if eventDate < datetime.date.today():
>             if event.has_key('RRULE'):
>                 freq = event.decoded('RRULE')['FREQ'][0]
>                 if event.decoded('RRULE').has_key('INTERVAL'):
>                     interval = event.decoded('RRULE')['INTERVAL'][0]
>                 else:
>                     interval = 1;
>                 if 'WEEKLY' == freq:
>                     delta = relativedelta(weeks=+interval)
>                 if 'MONTHLY' == freq:
>                     delta = relativedelta(months=+interval)
>                 if 'YEARLY' == freq:
>                     delta = relativedelta(years=+interval)
>                 while eventDate < datetime.date.today():
>                     eventDate += delta
>             else:
>                 continue        # if it's a non-repeating event in the
>                 past
> 
> 
> It used to work and all I have done meanwhile is to update my xubuntu
> system as fixes are released.  I'm now getting the error:-
> 
>     Traceback (most recent call last):
>       File "/home/chris/bin/calics.py", line 62, in <module>
>         eventDate += delta
>       File "/usr/lib/python2.7/dist-packages/dateutil/relativedelta.py",
>       line 261, in __radd__
>         day = min(calendar.monthrange(year, month)[1],
>     AttributeError: 'module' object has no attribute 'monthrange'
> 
> Have I lost a module somewhere in the updates or has something in
> python changed such that my code no longer works as it used to?
> 
> Can anyone help diagnose this please.

You probably have a file named calendar.py in your working directory:

$ python -c 'from dateutil.relativedelta import calendar; print 
calendar.__file__'
/usr/lib/python2.7/calendar.pyc
$ touch calendar.py
$ python -c 'from dateutil.relativedelta import calendar; print 
calendar.__file__'
calendar.py

Rename calendar.py in your working directory (and don't forget to delete the 
corresponding calendar.pyc) -- and dateutil should work again.

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#29815

Peter Otten <__peter__@web.de> wrote:
> tinnews@isbd.co.uk wrote:
> 
[snip description of problem]

> > Have I lost a module somewhere in the updates or has something in
> > python changed such that my code no longer works as it used to?
> > 
> > Can anyone help diagnose this please.
> 
> You probably have a file named calendar.py in your working directory:
> 
> $ python -c 'from dateutil.relativedelta import calendar; print 
> calendar.__file__'
> /usr/lib/python2.7/calendar.pyc
> $ touch calendar.py
> $ python -c 'from dateutil.relativedelta import calendar; print 
> calendar.__file__'
> calendar.py
> 
> Rename calendar.py in your working directory (and don't forget to delete the 
> corresponding calendar.pyc) -- and dateutil should work again.
> 
Brilliant, you're absolutely right!  Thank you!  :-)

I'd written calendar.py doing something else entirely.  I must
remember not to use such 'obvious' names for things!

-- 
Chris Green

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