Sending Dictionary via Network

[mumebuhi]

Hi,

Is it possible to send a non-string object from a Python program to
another? I particularly need to send a dictionary over to the other
program. However, this is not possible using the socket object's send()
function.

Help?


Buhi

[Larry Bates]

Re: Sending Dictionary via Network

mumebuhi wrote:

Hi,
>
Is it possible to send a non-string object from a Python program to
another? I particularly need to send a dictionary over to the other
program. However, this is not possible using the socket object's send()
function.
>
Help?
>
>
Buhi
>

You will need to pickle it first and unpickle it on the other
end. Other than that, you should be able to send it just fine.

-Larry

[Bruno Desthuilliers]

Re: Sending Dictionary via Network

mumebuhi a écrit :

Hi,
>
Is it possible to send a non-string object from a Python program to
another? I particularly need to send a dictionary over to the other
program. However, this is not possible using the socket object's send()
function.
>
Help?

>>d = dict(one=1, two="three", question="life, universe, and everything")
>>import simplejson
>>s = simplejson.dump s(d)
>>s

'{"question": "life, universe, and everything", "two": "three", "one": 1}'

>>simplejson.lo ads(s) == d

True

http://cheeseshop.python.org/pypi/simplejson

If you *really* want to "share" objects between programs, there are way
to do so (pyro comes to mind). But this gets more complicated...

[mumebuhi]

Re: Sending Dictionary via Network

Thank you very much for the reply.

Can pickle work directly with socket? The way I am doing right now is
to pickle the object to a file then send the file content through the
socket.

[mumebuhi]

Re: Sending Dictionary via Network

The simplejson module is really cool and simple to use. This is great!

For others who are just starting to use Python (like myself), simply
download and decompress the source bundle then copy the simplejson
directory to your sys.path (e.g. /usr/lib/python2.4/).

Thanks so much, Bruno.


Buhi


Bruno Desthuilliers wrote:

mumebuhi a écrit :

Hi,

Is it possible to send a non-string object from a Python program to
another? I particularly need to send a dictionary over to the other
program. However, this is not possible using the socket object's send()
function.

Help?

>
>

>d = dict(one=1, two="three", question="life, universe, and everything")
>>import simplejson
>>s = simplejson.dump s(d)
>>s

'{"question": "life, universe, and everything", "two": "three", "one": 1}'

>>simplejson.lo ads(s) == d

True
>

http://cheeseshop.python.org/pypi/simplejson

>
If you *really* want to "share" objects between programs, there are way
to do so (pyro comes to mind). But this gets more complicated...

[Ben Finney]

Re: Sending Dictionary via Network

Larry Bates <larry.bates@we bsafe.comwrites :

mumebuhi wrote:

Is it possible to send a non-string object from a Python program
to another? I particularly need to send a dictionary over to the
other program. However, this is not possible using the socket
object's send() function.

You want what is called "serialisation" : turning a data structure in
Python into a predictable sequence of (usually text) bytes, to turn it
back into an identical data structure at some other point in time.

<URL:http://en.wikipedia.or g/wiki/Serialization>

You will need to pickle it first and unpickle it on the other end.

There are many serialisation schemes possible; 'pickle' is just one
(and may be the right one in this case).

Others include JSON, marshal, some XML schema, etc.

--
\ "A child of five could understand this. Fetch me a child of |
`\ five." -- Groucho Marx |
_o__) |
Ben Finney

[Simon Forman]

Re: Sending Dictionary via Network


mumebuhi wrote:

Thank you very much for the reply.
>
Can pickle work directly with socket? The way I am doing right now is
to pickle the object to a file then send the file content through the
socket.

Pickle aso has dumps() and loads() to work with strings rather than
files.

Peace,
~Simon

[Steve Holden]

Re: Sending Dictionary via Network

mumebuhi wrote:

The simplejson module is really cool and simple to use. This is great!
>
For others who are just starting to use Python (like myself), simply
download and decompress the source bundle then copy the simplejson
directory to your sys.path (e.g. /usr/lib/python2.4/).
>

Alternatively, if you want a complete installation,

EITHER go to

http://cheeseshop.python.org/pypi/simplejson

download and extract the source then run

python setup.py install

in the extracted directory.

OR if you have easy_install, just run

easy_install simplejson

If you don't have easy_install, get it!

Thanks so much, Bruno.
>

regards
Steve
--
Steve Holden +44 150 684 7255 +1 800 494 3119
Holden Web LLC/Ltd http://www.holdenweb.com
Skype: holdenweb http://holdenweb.blogspot.com
Recent Ramblings http://del.icio.us/steve.holden

[Frithiof Andreas Jensen]

Re: Sending Dictionary via Network

"mumebuhi" <mumebuhi@gmail .comwrote in message

news:1161732155 .264210.77250@f 16g2000cwb.goog legroups.com...

The simplejson module is really cool and simple to use. This is great!

JUST what I need for some configuration files!!
Thanks for the link (die, configparse, dieee).

[Leif K-Brooks]

Re: Sending Dictionary via Network

Frithiof Andreas Jensen wrote:

>"mumebuhi" <mumebuhi@gmail .comwrote in message

news:1161732155 .264210.77250@f 16g2000cwb.goog legroups.com...

>The simplejson module is really cool and simple to use. This is great!

>
JUST what I need for some configuration files!!
Thanks for the link (die, configparse, dieee).

I would personally use YAML for configuration files instead of JSON,
because it's more human-readable. But it's a matter of personal preference.

[Chris Mellon]

Re: Sending Dictionary via Network

On 24 Oct 2006 16:56:43 -0700, Simon Forman <rogue_pedro@ya hoo.comwrote:

>
mumebuhi wrote:

Thank you very much for the reply.

Can pickle work directly with socket? The way I am doing right now is
to pickle the object to a file then send the file content through the
socket.

>
Pickle aso has dumps() and loads() to work with strings rather than
files.

I would recommend against using pickle if you're going to push it over
a network - there are signifigant dangers in unpickling anything
untrusted.

[Lawrence Oluyede]

Re: Sending Dictionary via Network

Chris Mellon <arkanes@gmail. comwrote:

I would recommend against using pickle if you're going to push it over
a network - there are signifigant dangers in unpickling anything
untrusted.

I confirm: http://jcalderone.livejournal.com/15864.html

--
Lawrence - http://www.oluyede.org/blog

http://www.neropercaso.it

"Nothing is more dangerous than an idea
if it's the only one you have" - E. A. Chartier

[Frithiof Andreas Jensen]

Re: Sending Dictionary via Network


"Leif K-Brooks" <eurleif@ecritt ers.bizwrote in message
news:453f5b4b$0 $13814$4d3efbfe @news.sover.net ...

Frithiof Andreas Jensen wrote:

"mumebuhi" <mumebuhi@gmail .comwrote in message

news:1161732155 .264210.77250@f 16g2000cwb.goog legroups.com...

The simplejson module is really cool and simple to use. This is great!

JUST what I need for some configuration files!!
Thanks for the link (die, configparse, dieee).

>
>
I would personally use YAML for configuration files instead of JSON,
because it's more human-readable. But it's a matter of personal preference.

Hehe: I am using YAML now. I find it readable - human ... hmm ;-)