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Date: Sun, 26 Feb 2012 03:58:18 -0800
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Subject: Re: pickle handling multiple objects ..
From: Chris Rebert <clp2@rebertia.com>
To: Smiley 4321 <ssmile03@gmail.com>
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:20889

On Sun, Feb 26, 2012 at 3:25 AM, Smiley 4321 <ssmile03@gmail.com> wrote:
> If I have a sample python code to be executed on Linux. How should=C2=A0 =
I handle
> multiple objects with 'pickle' as below -
>
> -------
> #!/usr/bin/python
>
> import pickle
>
> #my_list =3D {'a': 'Apple', 'b': 'Mango', 'c': 'Orange', 'd': 'Pineapple'=
}
> #my_list =3D ('Apple', 'Mango', 'Orange', 'Pineapple')
> my_list =3D ['Apple', 'Mango', 'Orange', 'Pineapple']
> #my_list =3D ()
> output =3D open('readfile.pkl', 'wb')
> pickle.dump(my_list, output)
> output.close()
>
> my_file =3D open('readfile.pkl', 'rb')
> my_list2 =3D pickle.load(my_file)
> my_file.close()
>
> print my_list
> print my_list2
> -----
>
> This code works fine but now I have to handle multiple objects?

You can either nest the multiple objects inside a single compound
object and just (un)pickle that, or you call call dump()/load()
repeatedly (once per object; yes, this works).

Cheers,
Chris