Python格式化输出

name = input('name:')
age = input('age:')

userInfo = '''
---------------- welcome ''' + name + '''-----------
name:'''+name+'''
age:''' + age

userInfo1 = '''
---------------- welcome %s -----------
name:%s
age:%s
''' % (name,name,age)

userInfo2 = '''
---------------- welcome {_userName} -----------
name:{_userName}
age:{_userAge}
'''.format(_userName = name,
           _userAge = age)

userInfo3 = '''
---------------- welcome {0} -----------
name:{0}
age:{1}
'''.format(name, age)

print(userInfo)
print(userInfo1)
print(userInfo2)
print(userInfo3)

打印如下：四种方式效果一样

---------------- welcome xubojoy -----------
name:xubojoy
age:20

温度转换

fahrenheit = 0
while fahrenheit <= 250:
    celsius = (fahrenheit - 32) / 1.8
    print('%5d %7.2f' % (fahrenheit,celsius))  #等价于print('{:5d} {:7.2f}'.format(fahrenheit, celsius))  #%5d 或者 {:5d} 默认保留5个位置的整数   %7.2f或者{:7.2f} 默认占7个单位的保留两位小数的浮点型
    fahrenheit = fahrenheit + 25