格式化字符串format函数使用方法

name = "bigberg"
age = 18
msg1="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 = 234
print('{:>8}'.format(number))
print('{:*>8}'.format(number))
#输出
     234
*****234

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

num = 25
print('{:b}'.format(num))
print('{:d}'.format(num))
print('{:o}'.format(num))
print('{:x}'.format(num))
#输出
11001
25
31
19