Converting NumPy array into Python array_like structure?

Question

1

How do I convert a NumPy array to a Python array_like structure (for example [[1,2,3],[4,5,6]] ), and do it reasonably fast?

asked Dec 27 '09 at 15:29

44% accept rate

Peter Hansen · Answer 1 · 2009-12-27 15:36:24Z

6

import numpy as np
>>> np.array([[1,2,3],[4,5,6]]).tolist()
[[1, 2, 3], [4, 5, 6]]

answered Dec 27 '09 at 15:31

Peter Mortensen · Answer 2 · 2009-12-28 21:22:09Z

4

NumPy arrays have a tolist method:

In [1]: arr=np.array([[1,2,3],[4,5,6]])

In [2]: arr.tolist()
Out[2]: [[1, 2, 3], [4, 5, 6]]

answered Dec 27 '09 at 15:32

~unutbu
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2 Answers