you have to define an initialization function: def__init__(self)
defining valCouche as an instance attribute make it accessible on all the method so we have the following

class projet(object):

    def __init__(self):
        self.valCouche = ''

    def nameCouche(self):
        self.valCouche =  float(ui.valLissage.displayText())

    @staticmethod #here there is no need for self so it is a method of class
    def choixTraitement():
        ui.okLissage.clicked.connect(p.goLissage)

    def goLissage(self):
        if ui.chkboxLissage.isChecked():
           print(self.valCouche) # result is False
           os.system(r'"C:\Program Files\FME\fme.exe" D:\Stelios\..... --MAX_NUM_POINTS {0}'.format(self.valCouche))


Difficulties with re-using a variable
I can't find much on how to set up any kind of establishments that are for charity. HOw would I go about this? Acquiring a building, a few volunteers, how much to run it per day, ect? Anyone have any experience in this? My character is a NG Druid, who had never been to a city and saw the poverty and lack of food and housing for people. He wants to help! But I have no idea on how to establish a continual act of help. Buying food for the town and stuff, one time is easy to figure out. How many people * ammount of food needed is the price. But for bigger acts of continual charity, who knows? 

EDIT:
So, it was suggested that I make an eco orphanage in a forest. I accidently doomed the continent with demons, so that won't work. (Wish spell to get rid of orcs, things went horribly wrong) NO one knows it was me though! :D 

I don't want the leadership feat cause I need my 6th level feat for a prestige class.

Also, I don't want to donate to the churches in this city, I'm finding a lot of corruption in some of these churches, especially this city, so I want something more controllable by me. 
