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# a -> Adam -> Book -> 4

# b -> Bill -> Computer -> 5

# -> TV -> 6

# Jill -> Sports -> 1

# c -> Bill -> Sports -> 3

# d -> Adam -> Computer -> 3

# Quin -> Computer -> 3

# e -> Quin -> Book -> 5

# -> TV -> 2

# f -> Adam -> Computer -> 7

def treePrint(tree):

for key in tree:

print key, # comma prevents a newline character

treeElem = tree[key] # multiple lookups is expensive, even amortized O(1)!

for subElem in treeElem:

print " -> ", subElem,

if type(subElem) != str: # OP wants indenting after digits

print "\n " # newline and a space to match indenting

print "" # forces a newline