如何在python中以[w * h]格式打印输出

Question

我正在尝试编写一个接受宽度，高度和字符的代码。将其打印在网格中[W * H] 我的代码如下..

width = int(raw_input("Width of myarray: "))
height = int(raw_input("Height of Array: "))
c= raw_input("Initial char:  ")
a=(width*c), (height*c)
print a

输出：

Width of myarray: 3
Height of Array: 3
Initial char:  +
+++++++++

我需要[['+', '+', '+'], ['+', '+', '+'], ['+', '+', '+']]这种格式的输出。

Answer 1

width = 3
height = 3
c= '+'

row = []
a = []
# create an individual row with the given width
for i in range(0,width):
    row.append(c)
# create the array of rows with the given height
for i in range(0,height):
    a.append(row)

print a

输出：

[['+', '+', '+'], ['+', '+', '+'], ['+', '+', '+']]

没有for循环和范围的方法如下：

width = 3
height = 3
c= '+'

row = []
a = []
# create an individual row with the given width
row = [c] * width
# create the array of rows with the given height
a = [row] * height

print a

输出：

[['+', '+', '+'], ['+', '+', '+'], ['+', '+', '+']]

如果您想检查给定的值，则可以使用try / except块：

width = raw_input("Width of myarray: ")
height = raw_input("Height of Array: ")
c= raw_input("Initial char:  ")
a = []

try:
    width = int(width)
    height = int(height)
    row = []
    row = [c] * width
    a = [row] * height
    print a
except:
    print None

输出：

Width of myarray: 
Height of Array: 
Initial char:  
None

Answer 2

这应该有效。如果您愿意，可以在IDLE中逐行输入这些内容（Stack本身不支持Python的缩进要求）：

def arr():
global array1
width = int(input('Enter width: \n'))
height = int(input('Enter height: \n'))
character = input('Desired character: \n')
array1 = [[character for i in range(width)] for i in range(height)]
print(array1)

使用以下方式调用：

arr()

它应该像这样运行：

 >>> arr()
 Enter width: 
 3
 Enter height: 
 4
 Desired character: 
 +

输出

 [['+', '+', '+'], ['+', '+', '+'], ['+', '+', '+'], ['+', '+', '+']]

修改

在回答下面的评论时，您可以使用：

def arr():
    global array1
    width = input('Enter width: \n')
    if (width == ''):
        print('None')
    if (width.isnumeric()):
        width1 = int(width)
    height = input('Enter height: \n')
    if (height == ''):
        print('None')
    if (height.isnumeric()):
        height1 = int(height)
    character = input('Desired character: \n')
    if (character == ''):
        print('None')
    if (width != '' and height != '' and character != ''):
        if (width.isnumeric() and height.isnumeric()):
            array1 = [[character for i in range(width1)] for i in  range(height1)]
            print(array1)
    else:
        print('None')