Si quieres pasame un string de ejemplo que esté completo y dime que hacer
con los values y te escribo la solución.
El 3 de junio de 2014, 17:38, Flavio Danesse <fdane...@gmail.com> escribió:
> Lo que hago es tomar el string que tienes y guardarlo en un archivo como
> texto plano pero luego lo cargo utilizando json con lo cual obtengo un
> diccionario python. Para obtener las keys y values del diccionario solo
> tienes que hacer diccionario.keys() y diccionario.values() o puedes hacer
> también diccionario.items() lo cual te da la pareja key:value.
>
> En todos los casos obtendrás lista de keys, values o items.
>
> Ahora bien, el primer obstáculo está salvado, que era pasar el string a un
> diccionario donde tienes parejas key-value.
>
> El segundo obstaculo es hacer recursividad dentro del diccionario para
> seguir hacia adentro de la estructura obteniendo los diccionarios internos.
> No es tan complicado, puedes comenzar con algo como:
>
> for key in diccionario.keys():
> valor = diccionario[key]
> . . . lo que quieras con el key y lo que quieras con value aca
> importa que tipo de dato es el value, porque por lo que veo tienes listas,
> diccionarios, string, etc, utiliza type(valor) para operar sobre ellos
> según su tipo.
>
>
>
>
> El 3 de junio de 2014, 17:13, Miguel Angel Rodriguez <maro...@gmail.com>
> escribió:
>
> No entiendo que haces con archivo...
>>
>> Nunca he programado con json en python.
>>
>> ¿Como seria a partir de lo que indicas el parseo de los datos? Es decir,
>> ¿Como seria el bucle que me iria dando el name y el value?
>>
>>
>>
>>
>> 2014-06-03 22:08 GMT+02:00 Flavio Danesse <fdane...@gmail.com>:
>>
>> Voto por lo correcto que sería así:
>>>
>>> import os
>>> import json
>>> import codecs
>>>
>>> text =
>>> '{"format":"JSON","result":{"devices":[{"key":"SCGDE1BA:180340320", etc
>>> . . .
>>>
>>> path = "/tmp/x.json"
>>>
>>> archivo = open(path, "w")
>>> archivo.write(text)
>>> archivo.close()
>>>
>>> archivo = codecs.open(path, "r", "utf-8")
>>> diccionario = json.JSONDecoder("utf-8").decode(archivo.read())
>>>
>>>
>>> El 3 de junio de 2014, 8:03, <gust...@nodo50.org> escribió:
>>>
>>> ejecutando esto:
>>>>
>>>> #!/usr/bin/python3
>>>> import re
>>>> value_str =
>>>>
>>>> '{"format":"JSON","result":{"devices":[{"key":"SCGDE1BA:180340320","channels":[{"name":"PF","unit":"","meta":"PF","value":"1.000"},{"name":"P-WSpt","unit":"kW","meta":"P-WSpt","value":"935"},{"name":"Vac","unit":"V","meta":"Vac","value":"217.5"},{"name":"Iac","unit":"A","meta":"Iac","value":"513.8"},{"name":"Pac","unit":"kW","meta":"Pac","value":"335.2"},{"name":"Qac","unit":"kVAr","meta":"Qac","value":"-1.0"},{"name":"Sac","unit":"kVA","meta":"Sac","value":"335.1"},{"name":"Fac","unit":"Hz","meta":"Fac","value":"49.950"},{"name":"ErrNoFirst","unit":"","meta":"ErrNoFirst","value":"0"},{"name":"P-WModFailStt","unit":"","meta":"P-WModFailStt","value":"Off"},{"name":"P-WModStt","unit":"","meta":"P-WModStt","value":"Off"},{"name":"Dsc","unit":"","meta":"Dsc","value":"---"},{"name":"Firmware-9","unit":"","meta":"Firmware-9","value":""},{"name":"Cntry","unit":"","meta":"Cntry","value":"DE1"}
>>>>
>>>> ,{"name":"Type","unit":"","meta":"Type","value":"SCG"},{"name":"Mode","unit":"","meta":"Mode","value":"Operation"},{"name":"Error","unit":"","meta":"Error","value":"---"}]}]},"version":"1.0"'
>>>>
>>>> for channel_str in re.findall("\"name\":\"[A-Za-z0-9\-.]+\"",value_str):
>>>> for channel_str1 in
>>>> re.findall("\"value\":\"[A-Za-z0-9\-.]+\"",value_str):
>>>> print ( channel_str + ";" + channel_str1 )
>>>>
>>>> me da esto:
>>>>
>>>> "name":"Cntry";"value":"335.2"
>>>> "name":"Cntry";"value":"-1.0"
>>>> "name":"Cntry";"value":"335.1"
>>>> "name":"Cntry";"value":"49.950"
>>>> "name":"Cntry";"value":"0"
>>>> "name":"Cntry";"value":"Off"
>>>> "name":"Cntry";"value":"Off"
>>>> "name":"Cntry";"value":"---"
>>>> "name":"Cntry";"value":"DE1"
>>>> "name":"Cntry";"value":"SCG"
>>>> "name":"Cntry";"value":"Operation"
>>>> "name":"Cntry";"value":"---"
>>>> "name":"Type";"value":"1.000"
>>>> "name":"Type";"value":"935"
>>>> "name":"Type";"value":"217.5"
>>>> "name":"Type";"value":"513.8"
>>>> "name":"Type";"value":"335.2"
>>>> "name":"Type";"value":"-1.0"
>>>> "name":"Type";"value":"335.1"
>>>> "name":"Type";"value":"49.950"
>>>>
>>>>
>>>> te vale?
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> > Hola a todos,
>>>> >
>>>> > Estoy intentando parsear con Python una gran cadena que recibo en un
>>>> > software de comunicaciones que estoy programando.
>>>> >
>>>> > La cadena que yo recibo es la siguiente:
>>>> >
>>>> > value_str =
>>>> >
>>>> {"format":"JSON","result":{"devices":[{"key":"SCGDE1BA:180340320","channels":[{"name":"PF","unit":"","meta":"PF","value":"1.000"},{"name":"P-WSpt","unit":"kW","meta":"P-WSpt","value":"935"},
>>>> >
>>>> >
>>>> {"name":"Vac","unit":"V","meta":"Vac","value":"217.5"},{"name":"Iac","unit":"A","meta":"Iac","value":"513.8"},{"name":"Pac","unit":"kW","meta":"Pac","value":"335.2"},{"name":"Qac","unit":"kV
>>>> >
>>>> >
>>>> Ar","meta":"Qac","value":"-1.0"},{"name":"Sac","unit":"kVA","meta":"Sac","value":"335.1"},{"name":"Fac","unit":"Hz","meta":"Fac","value":"49.950"},{"name":"ErrNoFirst","unit":"","meta":"ErrNoFirst","value":"0"},{"
>>>> >
>>>> >
>>>> name":"P-WModFailStt","unit":"","meta":"P-WModFailStt","value":"Off"},{"name":"P-WModStt","unit":"","meta":"P-WModStt","value":"Off"},{"name":"Dsc","unit":"","meta":"Dsc","value":"---"},{"name":"Firmware-9","unit":"","meta":"Firmware-9","value":"
>>>> > "},{"name":"Cntry","unit":"","meta":"Cntry","value":"DE1"}
>>>> >
>>>> ,{"name":"Type","unit":"","meta":"Type","value":"SCG"},{"name":"Mode","unit":"","meta":"Mode","value":"Operation"},{"name":"Error","unit":"","meta":"Error","value":"---"}]}]},"version":"1.0"
>>>> >
>>>> >
>>>> > Yo solo quiero quedarme con los name y value existente.
>>>> >
>>>> > LA forma en la que lo estoy intentando es la siguiente:
>>>> >
>>>> > for channel_str in re.findall("\"name\":\"[A-Za-z0-9\-.
>>>> > ]+\",\"value\":\"[A-Za-z0-9\-. ]*\"",value_str):
>>>> > d_value = re.findall("[A-Za-z0-9.\-]+",channel_str)
>>>> >
>>>> > Pero de esta forma no entra en el for.
>>>> >
>>>> > ¿Alguien me puede ayudar?
>>>> >
>>>> > Gracias y un saludo
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> >
>>>> > --
>>>> > Miguel Ángel Rodríguez de Alba
>>>> > 678304435
>>>> > maro...@gmail.com
>>>> > _______________________________________________
>>>> > Python-es mailing list
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>>>> > https://mail.python.org/mailman/listinfo/python-es
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>>>> >
>>>>
>>>>
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>>>
>>>
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>>
>>
>> --
>> Miguel Ángel Rodríguez de Alba
>> 678304435
>> maro...@gmail.com
>>
>> _______________________________________________
>> Python-es mailing list
>> Python-es@python.org
>> https://mail.python.org/mailman/listinfo/python-es
>> FAQ: http://python-es-faq.wikidot.com/
>>
>>
>
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