jason schrieb:
> Hello,
>
> I am completely new to python and I have question that I unfortunately
> could not find in the various documentation online. My best guess is
> that the answer should be quitte easy but I have just enterd the learning
> phase so that means a hightend chance for stupidity and mistakes on my
> part.
>
> I am trying to fill a nested dictionary from parsing a logfile. However
> each time there is only one key entry created and that's it. Just
> one entry, while the keys are different. That's 100% sure. I think
> therefore that it is an assignment error in my part. [there we have it...]
>
> To give an static example of the datastructure that I am using to clear
> any confusion on the datastructure part:
>
> records = { 'fam/jason-a' : {
> 'date' : 'Fri Sep 8 16:45:55 2006',
> 'from' : 'jason',
> 'subject' : 'Re: Oh my goes.....',
> 'msize' : '237284' },
> 'university/solar-system' : {
> 'date' : 'Fri Sep 8 16:45:46 2006',
> 'from' : 'jd',
> 'subject' : 'Vacancies for students',
> 'msize' : '9387' }
> }
>
> Looping over this datastructure is no problem.
> rkeys = ['date', 'from', 'subject', 'msize']
> for folder in records.keys():
> print '--'
> print folder
> for key in rkeys:
> print records[folder][key]
>
> Now for the actual program/dynamic part - assignment in the loop I use the
> following function. Note `datum' is not a date object, just a string.
>
> def parselog(data):
> other = 0
> records = {}
>
> for line in string.split(data, '\n'):
> str = line.strip()
> if str[:4] == 'From':
> mfrom, datum = extrfrom(str), extrdate(str)
> print datum, mfrom
> elif str[:4] == 'Fold':
> folder = extrfolder(str[8:])
> records = {folder : { 'date' : datum, 'mesgbytes' :
> extrmsize(str[8:]), 'mesgcount' : 1}}
> else:
> other += 1
>
> displrec(records)
>
> Note, this is not ment as a collision type datastructure, all initial data
> entries are unique. My question: Where is my assignment e.g. records =
> {folder.... wrong ?
What you essentially do is this:
records = {"some" : "dict"}
records = {"some other" : "dict"}
You rebind the name records to a new dictionary. So all your previously
stored data is garbage collected.
What you most probably want to do (I'm a bit confused about your code &
too lazy to dig deeper):
records = {}
records[folder] = {'date' : ...}
Notice that the dict[key]=value syntax mutates the existing dictionary.
Diez
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