Dada la siguiente lista: [82, 3, 49, 38, 94, 85, 95, 92, 64, 8, 75, 37, 97, 45, 12, 64, 48, 78, 29, 58] mostrar el número repetido en python

def rep(a):
  for i in range(len(a)):
    for j in range(len(a)):
      if i == j:
        continue
      if a[i] == a[j]:
        return a[i]
        
a = [82, 3, 49, 38, 94, 85, 95, 92, 64, 8, 75, 37, 97, 45, 12, 64, 48, 78, 29, 58]

print(rep(a))