None returned?

[robinsiebler@gmail.com]

I can't figure out -what- is going wrong here. When the code reaches
the 'return' line, there is data to be returned, but when it exits out
to the calling function, 'None' is returned!

import mx.DateTime

def get_weeks(weeks , year, dates, date_list={}):
if dates.has_key(y ear):
date_list[year] = dates[year].keys()[-weeks:]
if len(dates[year].keys()) >= weeks:
return date_list
else:
weeks = weeks - len(dates[year].keys())
get_weeks(weeks , str(int(year) -1), dates, date_list)

def get_report_date s(weeks, dates):
today = mx.DateTime.now ()
this_week = today.iso_week[1]
rpt_dates = get_weeks(weeks , str(today.year) , dates)
print rpt_dates

def main():

dates = {'2006': {'50': [50, 'This is the 50th week'],
'51': [51, 'This is the 51st week'],
'52': [52, 'This is the 52nd week']},
'2007': {'25': [1, 'This is the 1st week'],
'26': [2, 'This is the 2nd week'],
'27': [3, 'This is the 3rd week'],
'28': [4, 'This is the 4th week'],
'29': [5, 'This is the 5th week']}}

get_report_date s(6, dates)

[Kelvie Wong]

Re: None returned?

On 7/5/07, robinsiebler@gm ail.com <robinsiebler@g mail.comwrote:

I can't figure out -what- is going wrong here. When the code reaches
the 'return' line, there is data to be returned, but when it exits out
to the calling function, 'None' is returned!
>
import mx.DateTime
>
def get_weeks(weeks , year, dates, date_list={}):
if dates.has_key(y ear):
date_list[year] = dates[year].keys()[-weeks:]
if len(dates[year].keys()) >= weeks:
return date_list
else:
weeks = weeks - len(dates[year].keys())

Right here.

get_weeks(weeks , str(int(year) -1), dates, date_list)

You have to change that line to:
return get_weeks(weeks , str(int(year) -1), dates, date_list)

Otherwise, if len(dates[year.keys()) < weeks, it doesn't return anything.

>
def get_report_date s(weeks, dates):
today = mx.DateTime.now ()
this_week = today.iso_week[1]
rpt_dates = get_weeks(weeks , str(today.year) , dates)
print rpt_dates
>
def main():
>
dates = {'2006': {'50': [50, 'This is the 50th week'],
'51': [51, 'This is the 51st week'],
'52': [52, 'This is the 52nd week']},
'2007': {'25': [1, 'This is the 1st week'],
'26': [2, 'This is the 2nd week'],
'27': [3, 'This is the 3rd week'],
'28': [4, 'This is the 4th week'],
'29': [5, 'This is the 5th week']}}
>
get_report_date s(6, dates)
>
--

http://mail.python.org/mailman/listinfo/python-list

>

--
Kelvie

[Steve Holden]

Re: None returned?

robinsiebler@gm ail.com wrote:

I can't figure out -what- is going wrong here. When the code reaches
the 'return' line, there is data to be returned, but when it exits out
to the calling function, 'None' is returned!
>
import mx.DateTime
>
def get_weeks(weeks , year, dates, date_list={}):
if dates.has_key(y ear):
date_list[year] = dates[year].keys()[-weeks:]
if len(dates[year].keys()) >= weeks:
return date_list
else:
weeks = weeks - len(dates[year].keys())
get_weeks(weeks , str(int(year) -1), dates, date_list)
>

So if the else branch is taken here you end up dropping of the end of
the function's code, which will return None.

def get_report_date s(weeks, dates):
today = mx.DateTime.now ()
this_week = today.iso_week[1]
rpt_dates = get_weeks(weeks , str(today.year) , dates)
print rpt_dates
>
def main():
>
dates = {'2006': {'50': [50, 'This is the 50th week'],
'51': [51, 'This is the 51st week'],
'52': [52, 'This is the 52nd week']},
'2007': {'25': [1, 'This is the 1st week'],
'26': [2, 'This is the 2nd week'],
'27': [3, 'This is the 3rd week'],
'28': [4, 'This is the 4th week'],
'29': [5, 'This is the 5th week']}}
>
get_report_date s(6, dates)
>

regards
Steve
--
Steve Holden +1 571 484 6266 +1 800 494 3119
Holden Web LLC/Ltd http://www.holdenweb.com
Skype: holdenweb http://del.icio.us/steve.holden
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