ex2_3 pythonic thinking to print using a list generator that's converted to a tuple and used with a print statement

Author: Oliver

ex3_2.py

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+import stock
+import tableformat
+p = stock.read_portfolio('Data/portfolio.csv')
+tableformat.print_table(p, ['name', 'shares', 'price'])

tableformat.py

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+def print_table(data, headers):
+    print('%10s' * len(headers) % tuple(key for key in headers))
+    print(('-'*10 + ' ')* len(headers))
+    for item in data:
+        print('%10s' * len(headers) % tuple(getattr(item, h) for h in headers))