Numpy: Adding elements to array print

Question

I want to add elements to array print output. What I have done is like that(from 'Fallen Apart' my last post):

c = np.arange(9).reshape(3,3)
for i, row in enumerate(c):
    print('G' + str(i+1) + ': ' + str(row))

Result:

G1: [0 1 2]
G2: [3 4 5]
G3: [6 7 8]

What I want to do is to print like this:

G1: [1:0 2:1 3:2]
G2: [1:3 2:4 3:5]
G3: [1:6 2:7 3:8]

Anyone can help me with it? THanks!

what do you want to add? I can't make sense of [1:0 2:1 3:2], could you please clarify what you mean by that? — FObersteiner
– FObersteiner, Commented Jul 28, 2020 at 18:08
Just add 1:, 2: ,3:... in sequence before each value of each row in this array. — ViviAaron
– ViviAaron, Commented Jul 28, 2020 at 18:35

Ehsan · Accepted Answer · 2020-07-28 21:45:04Z

1

Similar to your code:

c = np.arange(9).reshape(3,3)
col_id = np.arange(c.shape[1])+1
for i, row in enumerate(c):
    print('G'+str(i+1)+': '+'[%s]'%' '.join([str(a)+':'+str(b) for a,b in zip(col_id,row)]))

or another equal solution:

c = np.arange(9).reshape(3,3)
col_id = np.arange(c.shape[1])+1
for i, row in enumerate(c):
    print('G'+str(i+1)+': '+'[%s]'%' '.join(["{}:{}".format(a,b) for a,b in zip(col_id,row)]))

output:

G1: [1:0 2:1 3:2]
G2: [1:3 2:4 3:5]
G3: [1:6 2:7 3:8]

edited Jul 28, 2020 at 21:45

answered Jul 28, 2020 at 19:30

Ehsan

12.5k2 gold badges24 silver badges36 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

ViviAaron Over a year ago

Thanks for your help,sir! I try to adapt your code to mine.But it does not work to an array of 10*24,it will only output from 1:...to 10:, other values are ignored.How to solve this kind of problem?Many thanks!

ViviAaron Over a year ago

I try to adapt it to mine（10*24）.The output is like that ` G1 : [1:xx,2:xx,..10:xx (from 11 to 24 missed)] `

Collectives™ on Stack Overflow

Numpy: Adding elements to array print

1 Answer 1

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related