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As usual, Éric is right but delphic (pythic ?)... Try this

L=[]
S=set(L)
for u in (your generator):
    s=set(u)
    if s not in S:
        L.extend(u) ## Maybe L.extend(copy(u)) if sharing structures may be a problem later...
        S.add((s)
L

At the end of execution, L should contain lists differing by at least one element.