第3章 使用字符串

代码清单3-1 字符串格式设置示例

# Print a formatted price list with a given width

width = int(input('Please enter width: '))

price_width = 10
item_width  = width - price_width

header_fmt = '{{:{}}}{{:>{}}}'.format(item_width, price_width)
fmt        = '{{:{}}}{{:>{}.2f}}'.format(item_width, price_width)

print('=' * width)

print(header_fmt.format('Item', 'Price'))

print('-' * width)

print(fmt.format('Apples', 0.4))
print(fmt.format('Pears', 0.5))
print(fmt.format('Cantaloupes', 1.92))
print(fmt.format('Dried Apricots (16 oz.)', 8))
print(fmt.format('Prunes (4 lbs.)', 12))

print('=' * width)

运行结果如下：

Please enter width: 35
===================================
Item                          Price
-----------------------------------
Apples                         0.40
Pears                          0.50
Cantaloupes                    1.92
Dried Apricots (16 oz.)        8.00
Prunes (4 lbs.)               12.00
===================================