Question

在制作程序以显示骰子脸部的视觉时，我正在测试它并且似乎有效，除了在每个骰子脸部之后没有打印。代码是：

def visual (x):
    types= ['+-------+','|       |','|   *   |','| *   * |']
    if x == 1:
        print (types[0]) 
        print (types[1]) 
        print (types[2]) 
        print (types[1]) 
        print (types[0])
    if x == 2:
        print (types[0]) 
        print (types[2]) 
        print (types[1]) 
        print (types[2]) 
        print (types[0])        
    if x == 3:
        print (types[0]) 
        print (types[2]) 
        print (types[2]) 
        print (types[2]) 
        print (types[0])        
    if x == 4:
        print (types[0]) 
        print (types[3]) 
        print (types[1]) 
        print (types[3]) 
        print (types[0])    
    if x == 5:
        print (types[0]) 
        print (types[3]) 
        print (types[2]) 
        print (types[3]) 
        print (types[0])        
    if x == 6:
        print (types[0]) 
        print (types[3]) 
        print (types[3]) 
        print (types[3]) 
        print (types[0]) 

def main():
    x = [1,2,3,4,5,6]
    for a in x:
        print (a)
        print (visual(a))

main()

它返回：

1
+-------+
|       |
|   *   |
|       |
+-------+
None
2
+-------+
|   *   |
|       |
|   *   |
+-------+
None
3
+-------+
|   *   |
|   *   |
|   *   |
+-------+
None
4
+-------+
| *   * |
|       |
| *   * |
+-------+
None
5
+-------+
| *   * |
|   *   |
| *   * |
+-------+
None
6
+-------+
| *   * |
| *   * |
| *   * |
+-------+
None

正如你所看到的那样，没有＆＃39;每个骰子脸被打印后出现。它显然必须在for循环中，但我不知道是什么导致它。

Answer 1

您无需print (visual(a))。您只需致电visual(a)。

print (visual(a))将打印visual(a)的返回值。由于它不会返回任何内容，因此将打印None。

是什么导致无人出现？

1 个答案: