格式化字符串format函数使用方法

name = "bigberg"age = 18msg1="my name is {},and my age is {}.".format(name,age)msg2="my name is {0},and my age is {1}.".format(name,age)msg3="my name is {_name},and my age is {_age}.".format(_name=name,_age=age)msg4="my name is {1},and my age is {0},and my brother's age is {0}.".format(age,name)print(msg1)print(msg2)print(msg3)print(msg4)#输出my name is bigberg,and my age is 18.my name is bigberg,and my age is 18.my name is bigberg,and my age is 18.my name is bigberg,and my age is 18,and my brother's age is 18.

info = ["bigberg",18]msg='{0[0]},{0[1]}'.format(info)print(msg)#输出bigberg,18

number = 234print('{:>8}'.format(number))print('{:*>8}'.format(number))#输出     234*****234

num = 123.23423print('{:.2f}'.format(num))#输出123.23

num = 25print('{:b}'.format(num))print('{:d}'.format(num))print('{:o}'.format(num))print('{:x}'.format(num))#输出11001253119