save dictionary for later use?

castironpi castironpi at gmail.com
Sat May 17 04:52:53 EDT 2008


On May 16, 4:23 pm, Hans Nowak <zephyrfalcon!NO_SP... at gmail.com>
wrote:
> globalrev wrote:
> > pickle.dumps(mg)
> > pickle.load(mg)
>
> > 'dict' object has no attribute 'readline'
> > dumps load(well i dont know but i get no complaint but running load
> > generates that error)
>
> The 'loads' and 'dumps' methods use strings:
>
>  >>> import pickle
>  >>> d = {"this": 42, "that": 101, "other": 17}
>  >>> s = pickle.dumps(d)
>  >>> s
> "(dp0\nS'this'\np1\nI42\nsS'other'\np2\nI17\nsS'that'\np3\nI101\ns."
>  >>> pickle.loads(s)
> {'this': 42, 'other': 17, 'that': 101}
>
> If you want to store to / restore from file, use 'dump' and 'load':
>
> # write to file 'out'...
>  >>> f = open("out")
>  >>> f = open("out", "wb")
>  >>> pickle.dump(d, f)
>  >>> f.close()
>
> # restore it later
>  >>> g = open("out", "rb")
>  >>> e = pickle.load(g)
>  >>> g.close()
>  >>> e
> {'this': 42, 'other': 17, 'that': 101}
>
> Also seehttp://docs.python.org/lib/pickle-example.html.
>
> Hope this helps!
>
> --Hans

I want to compare that cleanliness with other languages to compare
formats.

Is pickle.load( open( 'out', 'rb' ) ) any better or worse than
pickle.load( 'out', 'rb' )?



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