Converting Numpy ndarray to a list

Question

This is the result I get:

a=[array([[ 0.05019716]]), array([[ 0.04085874]])]

I would like to create such a list:

list_numbers=[ 0.05019716, 0.04085874]

Any advice will be appreciated

Zero · Accepted Answer · 2015-05-26 06:29:34Z

2

Here's one way

In [9]: np.array(a).ravel().tolist()
Out[9]: [0.05019716, 0.04085874]

Convert a, list, to NumPy array, then flatten it to array elements using ravel(), then convert to list using tolist().

However, for this specific case, you could also use list comprehensions

In [10]: [x[0][0] for x in a]   # or x[0, 0]
Out[10]: [0.050197159999999998, 0.040858739999999998]

answered May 26, 2015 at 6:26

Zero

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