用Python制作网格

如何指定默认值

r=int(input('Number of rows?: '))
c=int(input('Number of Columns?: '))
w=int(input('Width of a column'))
h=int(input('Height of a row'))  

row= (('+')+ w*('-')+('+'))* (c)   
width= (('-') * w)*c 
col=(('+')+ w*('-')+('+'))  
height=(('|')+ w * (' ')+ ('|'))* c

c=square brackets with zero in it

for i in range(r):
    print(row)
    print(height)

c.append(col)

print(c* square brackets having zero)

但它不起作用…[问题显示在上传的下图上]

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以下是我对您的最佳猜测：

r = int(input('Number of rows?: ') or 4)
c = int(input('Number of Columns?: ') or 4)
w = int(input('Width of a column') or 4)
h = int(input('Height of a row') or 4)  

row = (('+') + w * ('-')) * (c) + '+'
width= (('-') * w) * c 
col = (('+') + w * ('-') + ('+'))  
height = (('|') + w * (' ')) * c + '|'

#c=square brackets with zero in it

for i in range(r):
    print(row)
    for j in range(h):
        print(height)
print(row)

#c.append(col)
#print(c* square brackets having zero)

和一个示例运行：

Number of rows?: 3
Number of Columns?: 4
Width of a column5
Height of a row6
+-----+-----+-----+-----+
|     |     |     |     |
|     |     |     |     |
|     |     |     |     |
|     |     |     |     |
|     |     |     |     |
|     |     |     |     |
+-----+-----+-----+-----+
|     |     |     |     |
|     |     |     |     |
|     |     |     |     |
|     |     |     |     |
|     |     |     |     |
|     |     |     |     |
+-----+-----+-----+-----+
|     |     |     |     |
|     |     |     |     |
|     |     |     |     |
|     |     |     |     |
|     |     |     |     |
|     |     |     |     |
+-----+-----+-----+-----+

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也许您可以提供一些示例输出，并澄清您试图用

c

上传的图像做什么？