为什么4,5行代码要多一对{}?在代码中要做两次转换,那不应该是'{:{}}'为什么会错误必须要多一对花括号变成'{{:{}}}'
代码:
width = int(input('Please enter width:'))
price_width = 10
item_width = width - price_width
header_format = '{{:{}}}{{:>{}}}'.format(item_width,price_width)
format = '{{:{}}}{{:>{}.2f}}'.format(item_width,price_width)
print('='*width)
print(header_format.format('Item','Price'))
print('-'*width)
print(format.format('Apples',0.4))
print(format.format('Pears',0.5))
print(format.format('Cantaloupes',1.92))
print(format.format('ried Apricots (16 oz.)',8))
print(format.format('Apples',0.4))
print(format.format('Prunes (4 lbs.)',12))
print('='*width)
a = input('Please press enter!')