Question

What would be the most efficient way to do the following:

genres = [value_from_key(wb, 'Genre (1)', n),
          value_from_key(wb, 'Genre (2)', n),
          value_from_key(wb, 'Genre (3)', n),
          value_from_key(wb, 'Genre (4)', n),]

I tried doing it with a list comprehension — genres = [value_from_key(wb, 'Genre (%s)'%(i), n) for i in range[1,4]], but it kept raising a TypeError saying object is unsubscriptable. What would be the DRY way of doing the above? Thank you.

Answer 1

Replace the square brackets [1,4] with round braces (1,4) in your call to range:

genres = [value_from_key(wb, 'Genre (%s)'%(i), n) for i in range(1,4)]