Generate all anagrams of a string

def perm(t):
       if len(t) == 0:
               return []
       if len(t) == 1:
               return [t]
       else:
               L = []
               for i in range (0, len(t)):
                       selected_c = [t[i]]
                       subL = []
                       for j in range (0,i):
                               subL.append(t[j])
                       for j in range (i+1,len(t)):
                               subL.append(t[j])
                       V = perm(subL)
                       for s in perm(subL):
                               L.append(selected_c + s)
               return L

print map ( "".join , perm (list("ANNA")))
  

As usual other solutions to this problem exist