Python：FORループ、反復代入が正しい値を割り当てていない

Question

私はリストを入れています。この2番目のリストは、繰り返し実行し、位置に値を割り当てる必要があります。

エラーまたは数その 場所のすべてのインスタンスに配置されている「99」：だから私は同じことで、このコードの結果のすべてのバリエーションこの

matrix=[] 
list=[0,1,2,3,4,5,6,7,8,9] 
def board(): 
    for x in range(10): 
     for y in range(10): 
      matrix.append([[x,y],1]) #A grid is made, with a spare element 
    for i in range(100): 
     matrix[i][1]=list   #The grid is two elements, co-ords... 
            #and a list of attributes 


board() 
for i in range(100): 
    matrix[i][2][0]=i  #The first attribute,(in 2nd of2elements), 
print(matrix)    ##SHOULD be its own position 

を書きました。それは私が持っている（FORループ内の数字を生成することは、悲しいかな、私の好みだった）、私はこののいくつかのバリエーションを試してみました

...ループのための私の最後のiは 「99」NOT割り当てているように見えると言うことですこれを見て約6時間を費やした。 私の論理は、コンピュータが、その2番目の要素の最初の要素を0,1,2とすることを知っているはずです。 これは言語の制限が原因ではないことがわかります私が見ていないものを教えてください。これを行うと、同じアレイは、マトリクス状に割り当てられている

Answer 1

matrix[i][1]=list

。したがって、1つのアイテムを変更すると、すべてのアイテムが変更されます。代わりに、このようにリストのコピーを割り当てる：

matrix[i][1] = list[:]

としては、Python 3にあなたがlist.copy（）メソッドを使用することができ、@Bakuriuによって指摘しました。 Python 2では、copyモジュールを使用してコンテナをコピーすることができますl2 = copy.copy(l1)

また、 'list'はPythonの組み込み型であるため、変数 'list'の名前を変更する必要があります。

Answer 2

それはIndexErrorに提起としてあなたはmatrix[i][2][0]=i assignementを交換する必要があります。

for i in range(100): 
    matrix[i][1][0]=i  #The first attribute,(in 2nd of2elements), 
print(matrix)    ##SHOULD be its own position 

Answer 3

リストは、ループのために高速ですが、ここであなたはdictsと解決策を持っている：

from pprint import pprint as ppr 

matrix={} 
list=[0,1,2,3,4,5,6,7,8,9] 
def board(): 
    for x in range(10): 
     for y in range(10): 
      matrix[(x,y)]=1 
    for k in matrix.keys(): 
     matrix[k]=list 

board() 
ppr(matrix) 

for k in matrix.iterkeys(): 
    v=matrix[k][:] 
    v[2]=k[0]*10+k[1] 
    matrix[k]=v 
ppr(matrix)  

は入力：

{(0, 0): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(0, 1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(0, 2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(0, 3): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(0, 4): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(0, 5): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(0, 6): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(0, 7): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(0, 8): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(0, 9): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(1, 0): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(1, 1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(1, 2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(1, 3): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(1, 4): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(1, 5): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(1, 6): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(1, 7): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(1, 8): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(1, 9): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(2, 0): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(2, 1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(2, 2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(2, 3): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(2, 4): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(2, 5): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(2, 6): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(2, 7): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(2, 8): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(2, 9): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(3, 0): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(3, 1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(3, 2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(3, 3): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(3, 4): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(3, 5): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(3, 6): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(3, 7): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(3, 8): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(3, 9): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(4, 0): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(4, 1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(4, 2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(4, 3): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(4, 4): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(4, 5): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(4, 6): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(4, 7): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(4, 8): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(4, 9): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(5, 0): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(5, 1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(5, 2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(5, 3): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(5, 4): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(5, 5): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(5, 6): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(5, 7): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(5, 8): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(5, 9): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(6, 0): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(6, 1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(6, 2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(6, 3): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(6, 4): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(6, 5): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(6, 6): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(6, 7): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(6, 8): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(6, 9): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(7, 0): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(7, 1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(7, 2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(7, 3): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(7, 4): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(7, 5): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(7, 6): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(7, 7): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(7, 8): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(7, 9): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(8, 0): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(8, 1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(8, 2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(8, 3): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(8, 4): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(8, 5): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(8, 6): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(8, 7): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(8, 8): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(8, 9): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(9, 0): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(9, 1): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(9, 2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(9, 3): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(9, 4): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(9, 5): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(9, 6): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(9, 7): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(9, 8): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(9, 9): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]} 

出力：

{(0, 0): [0, 1, 0, 3, 4, 5, 6, 7, 8, 9], 
(0, 1): [0, 1, 1, 3, 4, 5, 6, 7, 8, 9], 
(0, 2): [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], 
(0, 3): [0, 1, 3, 3, 4, 5, 6, 7, 8, 9], 
(0, 4): [0, 1, 4, 3, 4, 5, 6, 7, 8, 9], 
(0, 5): [0, 1, 5, 3, 4, 5, 6, 7, 8, 9], 
(0, 6): [0, 1, 6, 3, 4, 5, 6, 7, 8, 9], 
(0, 7): [0, 1, 7, 3, 4, 5, 6, 7, 8, 9], 
(0, 8): [0, 1, 8, 3, 4, 5, 6, 7, 8, 9], 
(0, 9): [0, 1, 9, 3, 4, 5, 6, 7, 8, 9], 
(1, 0): [0, 1, 10, 3, 4, 5, 6, 7, 8, 9], 
(1, 1): [0, 1, 11, 3, 4, 5, 6, 7, 8, 9], 
(1, 2): [0, 1, 12, 3, 4, 5, 6, 7, 8, 9], 
(1, 3): [0, 1, 13, 3, 4, 5, 6, 7, 8, 9], 
(1, 4): [0, 1, 14, 3, 4, 5, 6, 7, 8, 9], 
(1, 5): [0, 1, 15, 3, 4, 5, 6, 7, 8, 9], 
(1, 6): [0, 1, 16, 3, 4, 5, 6, 7, 8, 9], 
(1, 7): [0, 1, 17, 3, 4, 5, 6, 7, 8, 9], 
(1, 8): [0, 1, 18, 3, 4, 5, 6, 7, 8, 9], 
(1, 9): [0, 1, 19, 3, 4, 5, 6, 7, 8, 9], 
(2, 0): [0, 1, 20, 3, 4, 5, 6, 7, 8, 9], 
(2, 1): [0, 1, 21, 3, 4, 5, 6, 7, 8, 9], 
(2, 2): [0, 1, 22, 3, 4, 5, 6, 7, 8, 9], 
(2, 3): [0, 1, 23, 3, 4, 5, 6, 7, 8, 9], 
(2, 4): [0, 1, 24, 3, 4, 5, 6, 7, 8, 9], 
(2, 5): [0, 1, 25, 3, 4, 5, 6, 7, 8, 9], 
(2, 6): [0, 1, 26, 3, 4, 5, 6, 7, 8, 9], 
(2, 7): [0, 1, 27, 3, 4, 5, 6, 7, 8, 9], 
(2, 8): [0, 1, 28, 3, 4, 5, 6, 7, 8, 9], 
(2, 9): [0, 1, 29, 3, 4, 5, 6, 7, 8, 9], 
(3, 0): [0, 1, 30, 3, 4, 5, 6, 7, 8, 9], 
(3, 1): [0, 1, 31, 3, 4, 5, 6, 7, 8, 9], 
(3, 2): [0, 1, 32, 3, 4, 5, 6, 7, 8, 9], 
(3, 3): [0, 1, 33, 3, 4, 5, 6, 7, 8, 9], 
(3, 4): [0, 1, 34, 3, 4, 5, 6, 7, 8, 9], 
(3, 5): [0, 1, 35, 3, 4, 5, 6, 7, 8, 9], 
(3, 6): [0, 1, 36, 3, 4, 5, 6, 7, 8, 9], 
(3, 7): [0, 1, 37, 3, 4, 5, 6, 7, 8, 9], 
(3, 8): [0, 1, 38, 3, 4, 5, 6, 7, 8, 9], 
(3, 9): [0, 1, 39, 3, 4, 5, 6, 7, 8, 9], 
(4, 0): [0, 1, 40, 3, 4, 5, 6, 7, 8, 9], 
(4, 1): [0, 1, 41, 3, 4, 5, 6, 7, 8, 9], 
(4, 2): [0, 1, 42, 3, 4, 5, 6, 7, 8, 9], 
(4, 3): [0, 1, 43, 3, 4, 5, 6, 7, 8, 9], 
(4, 4): [0, 1, 44, 3, 4, 5, 6, 7, 8, 9], 
(4, 5): [0, 1, 45, 3, 4, 5, 6, 7, 8, 9], 
(4, 6): [0, 1, 46, 3, 4, 5, 6, 7, 8, 9], 
(4, 7): [0, 1, 47, 3, 4, 5, 6, 7, 8, 9], 
(4, 8): [0, 1, 48, 3, 4, 5, 6, 7, 8, 9], 
(4, 9): [0, 1, 49, 3, 4, 5, 6, 7, 8, 9], 
(5, 0): [0, 1, 50, 3, 4, 5, 6, 7, 8, 9], 
(5, 1): [0, 1, 51, 3, 4, 5, 6, 7, 8, 9], 
(5, 2): [0, 1, 52, 3, 4, 5, 6, 7, 8, 9], 
(5, 3): [0, 1, 53, 3, 4, 5, 6, 7, 8, 9], 
(5, 4): [0, 1, 54, 3, 4, 5, 6, 7, 8, 9], 
(5, 5): [0, 1, 55, 3, 4, 5, 6, 7, 8, 9], 
(5, 6): [0, 1, 56, 3, 4, 5, 6, 7, 8, 9], 
(5, 7): [0, 1, 57, 3, 4, 5, 6, 7, 8, 9], 
(5, 8): [0, 1, 58, 3, 4, 5, 6, 7, 8, 9], 
(5, 9): [0, 1, 59, 3, 4, 5, 6, 7, 8, 9], 
(6, 0): [0, 1, 60, 3, 4, 5, 6, 7, 8, 9], 
(6, 1): [0, 1, 61, 3, 4, 5, 6, 7, 8, 9], 
(6, 2): [0, 1, 62, 3, 4, 5, 6, 7, 8, 9], 
(6, 3): [0, 1, 63, 3, 4, 5, 6, 7, 8, 9], 
(6, 4): [0, 1, 64, 3, 4, 5, 6, 7, 8, 9], 
(6, 5): [0, 1, 65, 3, 4, 5, 6, 7, 8, 9], 
(6, 6): [0, 1, 66, 3, 4, 5, 6, 7, 8, 9], 
(6, 7): [0, 1, 67, 3, 4, 5, 6, 7, 8, 9], 
(6, 8): [0, 1, 68, 3, 4, 5, 6, 7, 8, 9], 
(6, 9): [0, 1, 69, 3, 4, 5, 6, 7, 8, 9], 
(7, 0): [0, 1, 70, 3, 4, 5, 6, 7, 8, 9], 
(7, 1): [0, 1, 71, 3, 4, 5, 6, 7, 8, 9], 
(7, 2): [0, 1, 72, 3, 4, 5, 6, 7, 8, 9], 
(7, 3): [0, 1, 73, 3, 4, 5, 6, 7, 8, 9], 
(7, 4): [0, 1, 74, 3, 4, 5, 6, 7, 8, 9], 
(7, 5): [0, 1, 75, 3, 4, 5, 6, 7, 8, 9], 
(7, 6): [0, 1, 76, 3, 4, 5, 6, 7, 8, 9], 
(7, 7): [0, 1, 77, 3, 4, 5, 6, 7, 8, 9], 
(7, 8): [0, 1, 78, 3, 4, 5, 6, 7, 8, 9], 
(7, 9): [0, 1, 79, 3, 4, 5, 6, 7, 8, 9], 
(8, 0): [0, 1, 80, 3, 4, 5, 6, 7, 8, 9], 
(8, 1): [0, 1, 81, 3, 4, 5, 6, 7, 8, 9], 
(8, 2): [0, 1, 82, 3, 4, 5, 6, 7, 8, 9], 
(8, 3): [0, 1, 83, 3, 4, 5, 6, 7, 8, 9], 
(8, 4): [0, 1, 84, 3, 4, 5, 6, 7, 8, 9], 
(8, 5): [0, 1, 85, 3, 4, 5, 6, 7, 8, 9], 
(8, 6): [0, 1, 86, 3, 4, 5, 6, 7, 8, 9], 
(8, 7): [0, 1, 87, 3, 4, 5, 6, 7, 8, 9], 
(8, 8): [0, 1, 88, 3, 4, 5, 6, 7, 8, 9], 
(8, 9): [0, 1, 89, 3, 4, 5, 6, 7, 8, 9], 
(9, 0): [0, 1, 90, 3, 4, 5, 6, 7, 8, 9], 
(9, 1): [0, 1, 91, 3, 4, 5, 6, 7, 8, 9], 
(9, 2): [0, 1, 92, 3, 4, 5, 6, 7, 8, 9], 
(9, 3): [0, 1, 93, 3, 4, 5, 6, 7, 8, 9], 
(9, 4): [0, 1, 94, 3, 4, 5, 6, 7, 8, 9], 
(9, 5): [0, 1, 95, 3, 4, 5, 6, 7, 8, 9], 
(9, 6): [0, 1, 96, 3, 4, 5, 6, 7, 8, 9], 
(9, 7): [0, 1, 97, 3, 4, 5, 6, 7, 8, 9], 
(9, 8): [0, 1, 98, 3, 4, 5, 6, 7, 8, 9], 
(9, 9): [0, 1, 99, 3, 4, 5, 6, 7, 8, 9]} 

あなたは、高速インデックス（速くはそうあまりにもそれを見cython memoryviewである）で、ここでnumpyの使用することができます

matrix=np.zeros((100,10),dtype=int) 
list=[0,1,2,3,4,5,6,7,8,9] 
def board(matrix): 
    for x in range(10): 
     for y in range(10): 
      matrix[x*10+y]=1 #but here You populate whole sub-array of shape (10) with 1, so it will be: [1,1,1,1...,1] 
    print matrix 
    for k in range(matrix.shape[0]): 
     matrix[k]=list 

board(matrix) 
ppr(matrix) 

for k in range(matrix.shape[0]): 
    matrix[k,2]=k 
ppr(matrix)