Merge multiple 2d lists considering axis in order

Question

My purpose is to combine multiple 2d list in order such as:

a = [[1,2],[3,1]]
b= [[3,6],[2,9]]
c = [[5,1],[8,10]]
Expected: [[1,2,3,6,5,1],[3,1,2,9,8,10]]
         


        

Answer 1

This might be another solution using numpy but this is much slower.

import numpy as np

a = [[1,2],[3,1]]
b = [[3,6],[2,9]]
c = [[5,1],[8,10]]

print np.hstack((np.hstack((a,b)),c))

# [[ 1  2  3  6  5  1]
# [ 3  1  2  9  8 10]]

and if you want it to have a list format then use

np.hstack((np.hstack((a,b)),c)).tolist()