python numpyで繰り返された配列を作成する

pip install numpy

# Successfully installed numpy-1.19.4

import numpy as np

arr = np.array(["a", "b", "c"])

print(arr.repeat(3))

# ['a' 'a' 'a' 'a' 'b' 'b' 'b' 'b' 'c' 'c' 'c' 'c']

import numpy as np

arr = np.array(["a", "b", "c"])

print(arr.repeat(3).reshape(3, 3))

# [['a' 'a' 'a']
#  ['b' 'b' 'b']
#  ['c' 'c' 'c']]