width = input('Please enter width: ')
price_width = 10
item_width = width - price_width
header_format = '%-*s%*s'
format = '%-*s%*.2f'
print '=' * width
print header_format % (item_width,'Item',price_width,'Price')
print format % (item_width, 'Apples',price_width,0.4)
print format % (item_width, 'Pears', price_width,0.5)
print format % (item_width, 'Cantaloupes', price_width,1.92)
print format % (item_width, 'Dried Apricots (16 oz.)', price_width,8)
print format % (item_width, 'Prunes (4 lbs.)', price_width,12)
print '=' * width
使用*符号可以从元组中读取字段宽度
python version 2.4.3
