python append object to a list [duplicate]

I have the following code:

receps =[1,1,1,2,2,2,2,3,3,3,3,3,3]
listRecep = []
listNumRecep = []
class Line:
    def __init__(self,recep) :
        self.recep = recep
        
class Recep:
    recep=""
    lines = []

for recep in receps:
        l=Line(recep)
        if recep not in listNumRecep:
            listNumRecep.append(recep)
            r=Recep()
            r.recep=recep
            r.lines.append(l)
            #print(l.recep)
            listRecep.append(r)
        else:
            for re in listRecep:
                if re.recep == recep:
                    re.lines.append(l)
                    #print(l.recep)
        
for re in listRecep:
    print (re.lines[0].recep)

Basically what i want is to store every lines "Line" of the same "Recep" into a list contained in a "Recept" object. Then i print the recep of the first line.

So the output expected would be:

1
2
3

but actually i have

1
1
1

It looks like the first line is stored every time in the list and that's what I don't understand because when i print l.recep(commented lines) the correct output is printed so the problem is when the "Line" is affected to the "Recep".