[Tutor] Program gets stuck after a creating a list from dictinary items!

[Ali Torkamani]

I could resolve it by defining a small function:

def getValue(mydict,keys):
    A=[];
    for i in keys:
        A=A+[mydict[i]]
    return A

and then calling it: D=getValue(prog,sCommonFeatures);
(instead of D=[prog[key1] for key1 in list(sCommonFeatures)];)

but I'm still surprised why the latter one didn't work!


On Fri, Jul 6, 2012 at 12:28 PM, Ali Torkamani <torkamani at gmail.com> wrote:
>
> BTW I changed it to:
> D=[prog[key1] for key1 in list(sCommonFeatures)]
>
> because sCommonFeatures is actually a set, but it still has the smae
problem
>
>
> On Fri, Jul 6, 2012 at 12:27 PM, Ali Torkamani <torkamani at gmail.com>
wrote:
>>
>> Thanks, I checked,  FD is not empty,
>> Thanks for reminding about the flush and close, but I think some thing
is wrong with:
>>
>> D=[prog[key1] for key1 in sCommonFeatures]
>>
>> In the debug mode it works fine from the command line, but in the for
loop it gets stuck.
>>
>> Ali
>>
>>
>> On Fri, Jul 6, 2012 at 12:22 PM, Prasad, Ramit <ramit.prasad at jpmorgan.com>
wrote:
>>>
>>> From: Ali Torkamani
>>> > I'm trying to write a dictionary into a csv file, in the following
code
>>> > FlatData is the global dictionary whose keys are datetime objects,
and the
>>> > values are list of dictionaries. sCommonFeatures are key's that exist
in all
>>> > of such 'sub'-dictionaries, and sOtherFeatures are the key's that are
in some
>>> > of sub-dictionaries.
>>> >
>>> > The problem is that in line : D=[prog[key1] for key1 in
sCommonFeatures]
>>> > (line 10 below), the program stucks!
>>>
>>> Gets stuck how? I see nothing in that line that looks invalid. It may
just
>>> take awhile depending on the amount of keys it has to go through. Maybe
>>> you just need to wait longer?
>>>
>>> >
>>> > I appreciate any help.
>>> >
>>> > def WriteOneDayToCSV(sCommonFeatures,sOtherFeatures,date):
>>> >     FD=FlatData[date]
>>> >
>>> >
A=['UniqeDate','Year','Month','Day']+list(sCommonFeatures)+list(sOtherFeatures
>>> > )
>>> >     pdb.set_trace()
>>> >     with
>>> >
open(str(date.year)+"_"+str(date.month)+"_"+str(date.day)+".csv",'wb') as
>>> > myfile:
>>> >         fout = csv.writer(myfile, delimiter=',', quotechar="'")
>>> >
>>> >         fout.writerow(A)
>>> >         for prog in FD:
>>>
>>> Try inserting a print here to make sure FD is not an empty list.
>>>
>>> >             D=[prog[key1] for key1 in sCommonFeatures]
>>> >             print(prog)
>>> >             pdb.set_trace()
>>> >             diff=sOtherFeatures.difference(prog.keys())
>>> >             prog.update({x:'NONE' for x in diff})
>>> >
>>> >             C=[prog[key2] for key2 in sOtherFeatures]
>>> >             A=["%4d%02d%02d"
>>> > %(date.year,date.month,date.day),date.year,date.month,date.day]
>>> >             fout.writerow(A+D+C)
>>> >             pdb.set_trace()
>>> >         myfile.flush()
>>> >         myfile.close()
>>>
>>> There is no need to flush/close a file that is opened using "with".
>>>
>>> Ramit
>>>
>>>
>>> Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology
>>> 712 Main Street | Houston, TX 77002
>>> work phone: 713 - 216 - 5423
>>>
>>> --
>>>
>>> _______________________________________________
>>> Tutor maillist  -  Tutor at python.org
>>> To unsubscribe or change subscription options:
>>> http://mail.python.org/mailman/listinfo/tutor
>>
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/tutor/attachments/20120706/3867f974/attachment.html>