DUPLAS = []
df = pd.read_excel("TFD.xlsx", sheetname=1)
iterador = df.iterrows()
for x in iterador:
    DUPLAS.append( dupla(num = x[1][1], nome1=x[1][2], nome2=x[1][4] ))

def campeonato(planilha, ListaDeJuizes, PlanInicial, rodada):
    DUPLAS = []
    df = pd.read_excel(planilha, sheetname=PlanInicial)
    iterador = df.iterrows()
    for x in iterador:
        k = dupla(num = x[1][1], nome1=x[1][2], nome2=x[1][4] )
        DUPLAS.append(k)

UnboundLocalError                         Traceback (most recent call last)
<ipython-input-123-a18edbbf9ebf> in <module>()
----> 1 campeonato("TFD.xlsx", [101,102,103,104,201,202,203,204,205],1,1)

<ipython-input-122-53bbb2a6824e> in campeonato(planilha, ListaDeJuizes, PlanInicial, rodada)
      4     iterador = df.iterrows()
      5     for x in iterador:
----> 6         k = dupla(num = x[1][1], nome1=x[1][2], nome2=x[1][4] )
      7         DUPLAS.append(k)
      8     SALAS = []

UnboundLocalError: local variable 'dupla' referenced before assignment