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pythonで多次元配列を作成する関数を自作した

Last updated at Posted at 2017-12-16

初めに

pythonの多次元配列を作るには内包表記を入れ子にしなければなりません。
それでは面倒なので多次元配列を作る関数を自作しました。

ソースコード


def make_array(n,init_elem=0,td=1):
       dimension=len(n)
       if td>=dimension:
           return [init_elem for i in range(n[td-1])]
       else:
           return [make_array(n,init_elem,td+1) for i in range(n[td-1])]

使い方

1次元配列を定義する

print(make_array([10],0))
#[0,0,0,0,0,0,0,0,0,0]

初期化する数値を変える

print(make_array([10],1))
#[1, 1, 1, 1, 1, 1, 1, 1, 1, 1]

5*4の2次元配列

print(make_array([5,4],0))
#[[0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0], [0, 0, 0, 0]]

5次元配列(2*2*2*2*2)

print(make_array([2]*5,0))
#[[[[[0, 0], [0, 0]], [[0, 0], [0, 0]]], [[[0, 0], [0, 0]], [[0, 0], [0, 0]]]], [[[[0, 0], [0, 0]], [[0, 0], [0, 0]]], [[[0, 0], [0, 0]], [[0, 0], [0, 0]]]]]
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