字符串格式化

'''字符串格式化'''

msg = ' I am %s, my hobby is %s！' % ('mike', 'basketball') #%s能接收所有格式
print(msg)

msg1 = 'I am %s, age %d!' % ('mike', 18) #%d接收整型数值
print(msg1)

tp1 = 'percent %f' % 99.9762345 #%f接收浮点型数值，.表示小数点，后面跟的数字表示展示几位小数，而且无论是展示多少位都会取四舍五入
print(tp1)

tp2 = 'percent %.0f' % 99.9762345
print(tp2)

tp3 = 'I am %(name)s age %(age)d' % {'name':'alex', 'age':18} #键值对的方式进行拼接
print(tp3)


tp4 = 'I am {}, age {}, {}'.format('alex', 18, 'hello man!')
print(tp4)

tp5 = 'I am {2}, age {1}, {0}'.format('hello man!', 18, 'alex')
print(tp5)

tp6 = 'I am {name}, my hobby is {hobby}'.format(name='mike', hobby='basketball')
print(tp6)

tp7 = 'I am {name}, my hobby is {hobby}'.format(**{'name':'mike', 'hobby':'basketball'})
print(tp7)

tp8 = 'I am {:s}, age {:d}'.format(*['mike', 18])
print(tp8)