3.4字符串format方法指定参数的方式

• Python日常

# 第一題：字符串的format方法有几种指定参数的方式
# 默认方式（传入的参数与{}一一对应）、命名参数和位置参数{2}

# 默认方式，命名参数，位置参数演示
s1 = 'Today is {}, the temperature is {} degrees'

print(s1.format('Saturday', 24))
# Today is Saturday, the temperature is 24 degrees

s2 = 'Today is {day}, the temperature is {degree} degrees'
print(s2.format(day='Saturday',degree=24 ))
# Today is Saturday, the temperature is 24 degrees

s3 = 'Today is {week},{}, the {} temperature is {degree}'
print(s3.format('adcb',1234,week='sunday', degree=30))
# Today is sunday,adcb, the 1234 temperature is 30

s4 = 'Today is {week},{1}, the {0} temperature is {degree} degree'  # {1}取第二個值，{0}取第一個值
print(s4.format('abcd',1234,week='sunday',degree=43))
#  Today is sunday,1234, the abcd temperature is 43 degree

class Person:
    def __init__(self):
        self.age = 20
        self.name = 'Bill'
person = Person()

s5 = 'My name is {p.name},年齡{p.age}'
print(s5.format(p=person))
#  My name is Bill,年齡20

  Format方法使用一对大括号 { }指定字符串需要替换的内容。在花括号中间可以使用数字，表示引用特定位置的参数值，也可以使用标识符，可以根据名字设置相应位置的占位符。

• CSDN Python日常 第【3】4 篇
• 下一篇链接