[Tutor] Handling Objects

[Eric Walker]

Thanks Kent.. I think that would work for what I am doing. So is it safe to 
say that python doesn't do variable interpolation like perl..?

Thanks in advance.

Python Newbie...


On Wednesday 05 October 2005 05:20 pm, Kent Johnson wrote:
> Eric Walker wrote:
> > Well,
> > I think I probably can do this easier in perl but I took a vow I would
> > try and learn python.  I know I am using classes here and really don't
> > need objects. This is just another way for me to learn how to work with
> > classes within python. My object actually will be storing like 5 or 6
> > different attributes but I didn't include them in the example.  These
> > attributes  will be certain things that are read from the file.  Once I
> > get the objects i want to create in another directory the same files with
> > the same names but put different data into the new files depending on
> > what I read from the original files.
>
> OK, I would just make a list of the objects, since one of the attributes is
> the name you have everything you need in the object.
>
> def getNames():
>     import os
>     currentDir=os.getcwd()
>     temp=currentDir + '/TEMP'
>     os.chdir(temp)
>     baseList=os.listdir(".")
>     data = []
>     for name in baseList:
>         data.append(TPROJ(name))
>         print name
>     return data
>
> then to use the data something like
> for datum in data:
>     f = open(datum.name, 'w')
>     #etc
>
> Kent
>
> > Python Newbie....
> >
> > On Wednesday 05 October 2005 04:29 pm, Kent Johnson wrote:
> >>Eric Walker wrote:
> >>>New to Python and trying to do some class stuff with a simple task.
> >>>Problem:
> >>>1) get a list of file names in a directory
> >>>2) create variables with the same name of each filename pulled from the
> >>>directory.
> >>>3) Create an object for each and pass into the __init__ method the
> >>>stringname of the file name.
> >>>
> >>>This way I get a collection of objects that are the same name as the
> >>> file name and within each instance of the class , a particular
> >>> attribute will have the string name of the object.  Hope this isn't too
> >>> confusing.. example.
> >>
> >>What will you do with the names and objects once you have them? A better
> >>approach is probably to keep a dictionary that maps names to objects. If
> >>your object is really just storing the name you might as well just keep a
> >>list of names - the object isn't adding any value. If the object is going
> >>to have more behaviour then use a dict. If you really just want to print
> >>the names then you don't need to store them at all. For example with a
> >>dict:
> >>
> >>class TPROJ:
> >>    # as before
> >>
> >>def getNames():
> >>    import os
> >>    currentDir=os.getcwd()
> >>    temp=currentDir + '/TEMP'
> >>    os.chdir(temp)
> >>    baseList=os.listdir(".")
> >>    nameDict = {}
> >>    for name in baseList:
> >>        nameDict[name] = TPROJ(name)
> >>        print name
> >>    return nameDict
> >>
> >>HTH,
> >>Kent
> >>
> >>>class TPROJ:
> >>>    def __init__(self,value):#createMethod auto executes since it has __
> >>>        self.BASENAME = value
> >>>
> >>>   def display(self):#display method
> >>>        print self.BASENAME
> >>>
> >>>def getNames():
> >>>    import os
> >>>    currentDir=os.getcwd()
> >>>    temp=currentDir + '/TEMP'
> >>>    os.chdir(temp)
> >>>    baseList=os.listdir(".")
> >>>    for name in baseList:
> >>>        name = TPROJ(name)
> >>>        print name
> >>>
> >>>Can anyone see what I am trying to do?
> >>>
> >>>Python Newbie.......
> >>>_______________________________________________
> >>>Tutor maillist  -  Tutor at python.org
> >>>http://mail.python.org/mailman/listinfo/tutor
> >>
> >>_______________________________________________
> >>Tutor maillist  -  Tutor at python.org
> >>http://mail.python.org/mailman/listinfo/tutor
>
> _______________________________________________
> Tutor maillist  -  Tutor at python.org
> http://mail.python.org/mailman/listinfo/tutor

-- 
Eric Walker
EDA/CAD Engineer
Work: 208-368-2573