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Accepted
Fernando Javier León
Asked: 2022-05-29 22:40:40 +0800 CST 2022-05-29 22:40:40 +0800 CST

Complex processing of two dictionary arrays in python

  • 772

Hello I have two objects in python, the first one:

 completos = [
        {
        "id": 83,
        "bloque": "Proyectos",
        "atributo": "fecha_cierre",
        "orden": 1,
        "visible_cv_resumido": true,
        "visible_cv_completo": true,
        "mapeo": "fecha_cierre",
        "administrador": 1
    },
    {
        "id": 84,
        "bloque": "Proyectos",
        "atributo": "id",
        "orden": 1,
        "visible_cv_resumido": true,
        "visible_cv_completo": false,
        "mapeo": "id",
        "administrador": 1
    },
    {
        "id": 85,
        "bloque": "Proyectos",
        "atributo": "fecha_inicio",
        "orden": 1,
        "visible_cv_resumido": true,
        "visible_cv_completo": true,
        "mapeo": "fecha_inicio",
        "administrador": 1
    },
]

And another fix like this:

data = [
 {
            "id": 1,
            "fecha_inicio": "2005-02-01",
            "fecha_cierre": "2012-01-01",
            "codigo_proyecto": "",
            "nombre_proyecto": "Diferentes dentro del del Conocimiento Tradicional del Pueblo Saraguro",
            "descripcion": "",
            "tipo_proyecto": 65,
        },
        {
            "id": 3,
            "fecha_inicio": "2008-01-01",
            "fecha_cierre": "2012-06-30",
            "codigo_proyecto": "PROY_CBCM_0011",
            "nombre_proyecto": "PROSPECCION DE PRINCIPIOS ACTIVOS ANTICANCEROSOS DE LA FLORA DEL SUR DEL ECUADOR.",
            "descripcion": "El cancer constituye una de las principales causas de muerte, se estima que para el 2020 cerca de 13 millones de personas falleceran por esta enfermedad. Por tanto, el cancer constituye un problema de salud mundial y ocupa un lugar de importancia en lo",
            "tipo_proyecto": 65,
        }
]

How can I do that based on the field visible_cv_completoof the complete array, if that field is true I can obtain the information for example "atributo": "fecha_cierre"from the data array and obtain "fecha_cierre": "2012-01-01" or "atributo": "fecha_inicio"and from the data array obtain "fecha_inicio": "2005-02-01"In the first array called complete I have in the field atributowhat I want to obtain from the array data. I do not know how to do it. I hope you can help me. Thanks in advance.

python

1 Answers

  1. Best Answer

    I understand that what you are looking for is the following:

    • From the first list completosget the list of attributes that should be visible. According to your example, that list would be ['fecha_cierre', 'fecha_inicio']because they are the ones with Truethe key"visible_cv_completo"
    • From the second list data, copy all the dictionaries it contains, but leaving in each one of these dictionaries only the keys of the previously obtained list (that is, only the keys "fecha_cierre"and "fecha_inicio").

    This can be accomplished with a couple of list comprehensions.

    Extract the list of visible attributes

    visibles = [ d["atributo"] for d in completos if d.get("visible_cv_completo") ]

    This one is pretty straightforward: we iterate through the list completosgetting one dictionary at a dtime, and if in that dictionary the key "visible_cv_completo"is truthy , we add to the resultd["atributo"]

    Filter dictionaries from the second list

    This one is a bit more complicated:

    filtrados = [ {atributo: d.get(atributo) for atributo in visibles} for d in data ]

    Here again we iterate, this time over list data, getting a dictionary don each iteration. Based on that dictionary we dbuild another, using the expression {atributo: d.get(atributo) for atributo in visibles}. This other expression is a dictionary comprehension , where I iterate through the attributes in the list visiblesand for each attribute I get its value from the dictionary dcurrently being processed in the "main" loop.

    Applying this code to your example (after editing your example so that it is correct Python, which it is not, since you have to capitalize the values True​​and False), the following result appears in the list filtrados:

    [{'fecha_cierre': '2012-01-01', 'fecha_inicio': '2005-02-01'},
 {'fecha_cierre': '2012-06-30', 'fecha_inicio': '2008-01-01'}]

    Which I hope is what you were looking for.

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