How to parse a numpy array?

Question

I have Numpy array:

[[12 13 14],[15 16 17],[18 19 20]]

How do I get this

[[12, 13, 14], [15, 16, 17],[18 ,19, 20]]

i don't understand what you want, but does this help: str(numpy.ones((2,3))).replace('array(', '').replace(')', '') (if so, that has nothing to do with parsing). — andrew cooke
– andrew cooke, Commented Aug 14, 2011 at 14:58
Can you tell mehow you ended up assigning the value [[12 13 14] [15 16 17] [18 19 20]] to a variable ?I am curious — Kracekumar
– Kracekumar, Commented Aug 14, 2011 at 15:36

unutbu · Accepted Answer · 2011-08-14 14:56:08Z

13

When you see a numpy array printed without commas, you are just looking at its string representation. If you want it printed with commas, you could convert it to a Python list:

In [45]: print(arr)
[[12 13 14]
 [15 16 17]
 [18 19 20]]

In [46]: arr_list = arr.tolist()

In [47]: print(arr_list)
[[12, 13, 14], [15, 16, 17], [18, 19, 20]]

answered Aug 14, 2011 at 14:56

unutbu

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