Python Numpy 2D array aligned without brackets

Question

I want to print 2D array without brackets and so that elements are aligned. I went through bunch of posts and manged to remove brackets but then elements are not aligned anymore and if I print my array like it is, elements are aligned but then there are brackets.

My code is simple

a = np.asarray(b._BaseArray__data).reshape(3,3)
print(a)

Where b._BaseArray__data represents list.

So how can I print my array that will be aligned and without brackets and commas?

Current result:

[[1, 2, 3, 4]
 [5, 6, 7, 8]
 [9,10,11,12]]

And I want it like this:

1  2  3  4
5  6  7  8
9 10 11 12

You can just use the docs for formatting, or provide a separator argument to print and loop through the array — roganjosh
– roganjosh, Commented Oct 20, 2018 at 10:07
How does your data look like? How should the output look like? You're getting down-votes because you do not provide all the necessary information for us to help you. Please add a working, minimal example to your question! — Daniel Schütte
– Daniel Schütte, Commented Oct 20, 2018 at 11:08
That sounds like a lot more work than it's worth. How flexible do you want to be in alignment? Just handling this simple example, or something more general? — hpaulj
– hpaulj, Commented Oct 20, 2018 at 14:49

Daniel Schütte · Accepted Answer · 2018-10-20 11:34:53Z

1

The following code should do what you want with two nested forloops:

import numpy as np

# example data
arr = np.array([[1, 2, 3, 4], [5, 6, 7, 8], [9, 10, 11, 12]])


def print_array(arr):
    """
    prints a 2-D numpy array in a nicer format
    """
    for a in arr:
        for elem in a:
            print("{}".format(elem).rjust(3), end="")
        print(end="\n")


# call the printing function
print_array(arr)

prints:

  1  2  3  4
  5  6  7  8
  9 10 11 12

edited Oct 20, 2018 at 11:34

answered Oct 20, 2018 at 11:26

Daniel Schütte

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