On Mon, 23 Jan 2006 21:00:55 +0200, Ilias Lazaridis <[EMAIL PROTECTED]> wrote:
>within a python script, I like to create a collection which I fill with >values from an external text-file (user editable). > >How is this accomplished the easiest way (if possible without the need >of libraries which are not part of the standard distribution)? > >something like: > >text-file: >{peter, 16}, >{anton, 21} > >- > >within code: > >users.load(text-file.txt) > >for user in users > user.name > user.age > >. > >-- >http://lazaridis.com I'd use a CSV text file, maybe something like (only tested as far as you see!): ----< for_ilias_lazaridis.py >---------------------------------------------- import csv, types class Fields(object): def __init__(self, kvpairs): self.__dict__.update(kvpairs) class Users(object): def __init__(self): self.userlist=[] def load(self, lineiter): if isinstance(lineiter, basestring): lineiter = open(lineiter) # assume it's a file path csvit = csv.reader(lineiter) self.colnames = colnames = csvit.next() typenames = csvit.next() self.coltypes =coltypes = [getattr(types, name.capitalize()+'Type') for name in typenames] for row in csvit: self.userlist.append(Fields(zip(colnames, (t(s) for t,s in zip(coltypes, row))))) def __iter__(self): return iter(self.userlist) def test(): import StringIO f = StringIO.StringIO("""\ name,age String,Int peter,16 anton,21 """) users = Users() users.load(f) for user in users: print user.name, user.age for user in users: for name in users.colnames: print '%s=%s,'%(name, getattr(user, name)), print if __name__ == '__main__': test() ----------------------------------------------------------------------- Output: [ 4:47] C:\pywk\clp>py24 for_ilias_lazaridis.py peter 16 anton 21 name=peter, age=16, name=anton, age=21, (the first for user in users loop presumes knowledge of the field names name and age. The second gets them automatically from the names loaded in the load method from the first line of the text file. The second line expects type names as you see in the types module, except without the "Type" suffix. Perhaps you can adapt for your purposes. Regards, Bengt Richter -- http://mail.python.org/mailman/listinfo/python-list