python中單個print()函數的結果是什么

Question

我有一個 python 子列表和一個函數（用 . 替換 0）來打印這個子列表（是的，就像數獨）。 代碼如下。

 grid = [[5,3,0,0,7,0,0,0,0], [6,0,0,1,9,5,0,0,0], [0,9,8,0,0,0,0,6,0], [8,0,0,0,6,0,0,0,3], [4,0,0,8,0,3,0,0,1], [7,0,0,0,2,0,0,0,6], [0,6,0,0,0,0,2,8,0], [0,0,0,4,1,9,0,0,5], [0,0,0,0,8,0,0,7,9]] def print_grid(): for row in grid: for column in row: if column == 0: print("." , end=" ") else: print(column , end=" ")

運行print_grid() 后，得到如下結果。 我想知道如何逐行打印它。 在此先感謝您的任何幫助。

 3 . . 7 . . . . 6 . . 1 9 5 . . . . 9 8 . . . . 6 . 8 . . . 6 . . . 3 4 . . 8 . 3 . . 1 7 . . . 2 . . . 6 . 6 . . . . 2 8 . . . . 4 1 9 . . 5 . . . . 8 . . 7 9

Answer 1

在第二個 for 循環的末尾添加一個print() ：

grid = [[5,3,0,0,7,0,0,0,0], 
        [6,0,0,1,9,5,0,0,0], 
        [0,9,8,0,0,0,0,6,0], 
        [8,0,0,0,6,0,0,0,3], 
        [4,0,0,8,0,3,0,0,1], 
        [7,0,0,0,2,0,0,0,6], 
        [0,6,0,0,0,0,2,8,0], 
        [0,0,0,4,1,9,0,0,5], 
        [0,0,0,0,8,0,0,7,9]]
        
def print_grid():
    for row in grid:
        for column in row:
            if column == 0:
                print("." , end=" ")
            else:
                print(column , end=" ")
        print()

print_grid()

Answer 2

這以更簡單的方式實現了您正在尋找的結果，“逐行”打印網格的每一行。 對於每一行，我們使用列表理解來生成行值的新列表，其中 0 替換為“。” 然后使用 splat 運算符 (*) 我們將此行作為參數傳遞，print 語句將在其間打印空格。

grid = [[5,3,0,0,7,0,0,0,0], 
    [6,0,0,1,9,5,0,0,0], 
    [0,9,8,0,0,0,0,6,0], 
    [8,0,0,0,6,0,0,0,3], 
    [4,0,0,8,0,3,0,0,1], 
    [7,0,0,0,2,0,0,0,6], 
    [0,6,0,0,0,0,2,8,0], 
    [0,0,0,4,1,9,0,0,5], 
    [0,0,0,0,8,0,0,7,9]]

for row in grid:
    print(*["." if val == 0 else val for val in row])  

Answer 3

Numpy模塊非常適合這一點。 但也需要您的打印功能成為板卡修改功能。

grid = [[5,3,0,0,7,0,0,0,0], 
    [6,0,0,1,9,5,0,0,0], 
    [0,9,8,0,0,0,0,6,0], 
    [8,0,0,0,6,0,0,0,3], 
    [4,0,0,8,0,3,0,0,1], 
    [7,0,0,0,2,0,0,0,6], 
    [0,6,0,0,0,0,2,8,0], 
    [0,0,0,4,1,9,0,0,5], 
    [0,0,0,0,8,0,0,7,9]]
    
def change_grid():
    for x in range(9):
        for y in range(9):
            if grid[x][y] == 0:
                grid[x][y] = "." 
change_grid()
print(np.matrix(grid))

Answer 4

您需要做的就是每次循環遍歷一行時更改一行。

def print_grid():
    for row in grid:
        print("")
        for column in row:
            if column == 0:
                print("." , end=" ")
            else:
                print(column , end=" ")