[Tutor] Trying to enter text from a file to a Dictionary

[Ben Markwell]

On 1/27/06, Bob Gailer <bgailer at alum.rpi.edu> wrote:
>
> Bob Gailer wrote:
> > Alan Gauld wrote:
> >
> >> Hi Ben,
> >>
> >>
> >>
> >>> I want to enter the words and definitions from the  text file into the
> >>> dict.
> >>> The way the text file is set up is that one  line is the word and the
> >>> next line is the definition.
> >>>
> >>>
> >>
> >>
> >>>  I tried using a for loop like this
> >>>
> >>>  f = open('glossary.txt','r')
> >>>  gloss = {}
> >>>
> >>>  for line in f:
> >>>      gloss[line] = line
> >>>
> >>>
> >> The problem that you have is that you really need to read two lines at
> a
> >> time.
> >> (Assuming that the definitions are all on one line which may not be
> true!)
> >> A while loop may be easier in this case.
> >>
> >> A for loop will read each line individually. You then need to set a
> >> definition
> >> flag to tell the loop body whether you are reading a definition or a
> key.
> >>
> >> Either type of loop is possible. Since you started with a for loop lets
> >> stick with it...
> >>
> >> definition = False
> >> currentKey = None
> >>
> >> for line in f:
> >>     if isDefinition:
> >>        gloss[currentKey] = line
> >>        currentKey = None
> >>        isDefinition = False
> >>     else:
> >>        currentKey = line
> >>        isDefinition = True
> >>
> >>
> > Or you can use next():
> >
> > for line in f:
> >     gloss[line] = f.next()
> >
> Or even:
> [gloss.setdefault(l,f.next()) for l in f]


Hello Bob

I understand f.next(), but [gloss.setdefault(l,f.next()) for l in f] is
beyond me at this point.
Thanks for your input.

Ben
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