Example: two recursive-call function

def chop(word):
  if len(word) > 0:
      print(word)
      chop(w[1:])  # 1st recursive call
      print('---')
      chop(w[1:] ) # 2nd recursive call
      print('*')

Solution

Notes:

the brown circled letters indicate which print statements produce which printed lines
the numbers above each function call frame indicate the order in which they are opened (1-15)
the function call frames 4, 5, 7, 8, 11, 12, 14 and 15 are invoked with an empty string (''). This makes len(word) > 0 False, which means nothing is printed.

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