text: #!/bin/env python3
  
  # Author: ph-u
  # Script: tuple.py
  # Desc: python homework
  # Input: python3 tuple.py
  # Output: python interpreter output five blocks with three-lined each
  # Arguments: 0
  # Date: Oct 2019
  
  """python homework"""
  
  __appname__="tuple.py"
  __author__="ph-u"
  __version__="0.0.1"
  __license__="None"
  
  birds = ( ('Passerculus sandwichensis','Savannah sparrow',18.7),
            ('Delichon urbica','House martin',19),
            ('Junco phaeonotus','Yellow-eyed junco',19.5),
            ('Junco hyemalis','Dark-eyed junco',19.6),
            ('Tachycineata bicolor','Tree swallow',20.2),
          )
  
  # Birds is a tuple of tuples of length three: latin name, common name, mass.
  # write a (short) script to print these on a separate line or output block by species 
  # Hints: use the "print" command! You can use list comprehensions!
  
  for i in range(len(birds)):
      for j in range(len(birds[i][:])):
          if j > 1: k="Mass: "
          elif j<1: k="Latin name: "
          else: k="Common name: "
          print(k,str(birds[i][j]))
      print("")
  