Adding new fields based on condition using PyQGIS

Question

I want to add another condition in my code.

This is my code:

tablePT = QgsVectorLayer('None', 'table_PT', 'memory')
tablePT.dataProvider().addAttributes(
    [QgsField("Type", QVariant.String), QgsField("FT", QVariant.Int),
     QgsField("FREE", QVariant.Int), QgsField("PRIVE", QVariant.Int),
     ])
tablePT.updateFields()
dicoPT = {'CHAMBRE': (0, 0, 0), 'POTEAU': (0, 0, 0)}
nbPTTotal = 0
for pt in self.couchePT.getFeatures() :
    typeStruc = pt['TYPE_STRUC']
    proprietaire = pt['PROPRIETAI']
    if typeStruc in ['CHAMBRE', 'POTEAU'] :
        if proprietaire == 'FT' :
            dicoPT[typeStruc] = tuple(map(operator.add, (1, 0, 0), dicoPT[typeStruc]))
            nbPTTotal += 1
        elif proprietaire == 'FREE MOBILE' :
            dicoPT[typeStruc] = tuple(map(operator.add, (0, 1, 0), dicoPT[typeStruc]))
            nbPTTotal += 1
        elif proprietaire == 'PRIVE' :
            dicoPT[typeStruc] = tuple(map(operator.add, (0, 0, 1), dicoPT[typeStruc]))
            nbPTTotal += 1
        else:
            QMessageBox.critical(None, "Problème de PT",
                                 "Le point_technique %s possède un propriétaire qui ne fait pas partie de la liste." % str(pt['NOM']))
    else:
        QMessageBox.critical(None, "Problème de PT",
                             "Le point_technique %s possède un type de strcture qui ne fait pas partie de la liste." % str(pt['NOM']))
ligneChambre = QgsFeature()
ligneChambre.setAttributes(['chambres', dicoPT['CHAMBRE'][0], dicoPT['CHAMBRE'][1], dicoPT['CHAMBRE'][2]])
lignePoteau = QgsFeature()
lignePoteau.setAttributes(['poteaux', dicoPT['POTEAU'][0], dicoPT['POTEAU'][1], dicoPT['POTEAU'][2]])
ligneTotaux = QgsFeature()
ligneTotaux.setAttributes(['Total général', "", "", nbPTTotal])
tablePT.dataProvider().addFeatures([ligneChambre])
tablePT.dataProvider().addFeatures([lignePoteau])
tablePT.dataProvider().addFeatures([ligneTotaux])

QgsProject.instance().addMapLayer(tablePT)

This is my table for now:

but I want to get information based on two condition just like this:

I want a table with rows that result from two condition in the same time:

First row = (case when typeStruc='CHAMBRE' and ETAT='EN SERVICE') => "CHAMBRE EXISTANT"

Second row = (case when typeStruc='CHAMBRE' and ETAT='EN ETUDE') => "CHAMBRE A POSE"

Third row = (case when typeStruc='POTEAU' and ETAT='EN ETUDE') => "POTEAU EXISTANT"

Fourth row = (case when typeStruc='POTEAU' and ETAT='EN ETUDE') => "POTEAU A POSE"  

Answer 1

Use this script. I guess it works for you.

layer = QgsProject.instance().mapLayersByName("PT")[0]

tablePT = QgsVectorLayer("None", "table_PT", "memory")
tablePT.dataProvider().addAttributes(
    [QgsField("Type", QVariant.String),
     QgsField("FT", QVariant.Int),
     QgsField("FREE", QVariant.Int),
     QgsField("PRIVE", QVariant.Int)])
tablePT.updateFields()

# types    
t = ["Chambre Existant", "Chambre a poser", "Poteau Existant", "Poteau a poser"]

d = {t[0]: {"FT": 0, "FREE MOBILE": 0, "PRIVE": 0},
     t[1]: {"FT": 0, "FREE MOBILE": 0, "PRIVE": 0},
     t[2]: {"FT": 0, "FREE MOBILE": 0, "PRIVE": 0},
     t[3]: {"FT": 0, "FREE MOBILE": 0, "PRIVE": 0}}

for pt in layer.getFeatures():
    stru = pt["TYPE_STRUC"]
    etat = pt["ETAT"]
    prop = pt["PROPRIETAI"]

    if prop in ["FT", "FREE MOBILE", "PRIVE"]:
        if stru == "CHAMBRE":
            if etat == "EN SERVICE":
                d[t[0]][prop] += 1
            elif etat == "EN ETUDE":
                d[t[1]][prop] += 1
        elif stru == "POTEAU":
            if etat == "EN SERVICE":
                d[t[2]][prop] += 1
            elif etat == "EN ETUDE":
                d[t[3]][prop] += 1
        else: 
            print(f"Le point_technique {pt['NOM']} possède un type de strcture ...")            
    else:
        print(f"Le point_technique {pt['NOM']} possède un propriétaire ...")

for i in [0, 1, 2, 3]:
    feature = QgsFeature(tablePT.fields())
    feature.setAttributes([ t[i], d[t[i]]["FT"], d[t[i]]["FREE MOBILE"], d[t[i]]["PRIVE"] ])
    tablePT.dataProvider().addFeatures([feature])

QgsProject.instance().addMapLayer(tablePT)

Sample data:

TYPE_STRUC	ETAT	PROPRIETAI	NOM
CHAMBRE	EN ETUDE	FREE MOBILE	9
EN ETUDE		FREE MOBILE	8
POTEAU	EN ETUDE	FREE MOBILE	7
CHAMBRE	EN ETUDE	FREE MOBILE	6
CHAMBRE	EN ETUDE	FREE MOBILE	5
EN ETUDE		FREE MOBILE	4
CHAMBRE	EN ETUDE	FREE MOBILE	3
POTEAU	EN ETUDE		2
CHAMBRE	EN SERVICE	PRIVE	15
POTEAU	EN SERVICE	PRIVE	14
CHAMBRE	EN SERVICE	FT	13
POTEAU	EN SERVICE	FT	12
POTEAU	EN SERVICE	FT	11
CHAMBRE	EN SERVICE	FT	10
CHAMBRE	EN SERVICE		1

Result for the sample data: