format字符串格式化

# tpl = "i am {name}, age {age}, really {name}".format(name="seven", age=18)
# print(tpl)#i am seven, age 18, really seven

# tpl = "i am {name}, age {age}, really {name}".format(**{"name": "seven", "age": 18})
# print(tpl) #i am seven, age 18, really seven

# tpl = "i am {:s}, age {:d}".format(*["seven", 18])
# print(tpl) #i am seven, age 18

# tpl = "i am {:s}, age {:d}".format("seven", 18) #["seven", 18]
# print(tpl)#i am seven, age 18

# l=["seven", 18]
# tpl = "i am {:s}, age {:d}".format('seven',18)
# print(tpl) #i am seven, age 18

# tpl = "numbers: {:b},{:o},{:d},{:x},{:X}, {:%},{}".format(15, 15, 15, 15, 15, 15.87623, 2)
# print(tpl) #numbers: 1111,17,15,f,F, 1587.623000%,2