01Python基础_04输入输出方式

　　1. input('str')

 1 # coding=utf-8
 2 # 获取用户信息并输出
 3 
 4 name = input('name:')
 5 age = int(input('age:'))     #input默认得到字符串
 6 job = input('job:')
 7 
 8 info = '''
 9 姓名:%s
10 年龄:%d
11 职业:%s
12 ''' % (name, age, job)
13 
14 info2 ='''
15 name:{_name}
16 age:{_age}
17 job:{_job}
18 '''.format(_name = name, _age = age, _job = job)
19 
20 info3 = '''
21 name:{2}
22 age:{1}
23 job:{0}
24 '''.format(name, age, job)
25 print(info)
26 print(info2)
27 print(info3)
#注：input()获得的数据类型为‘str’

　　2. 暗码获取输入

 1 # 判断用户舒服的用户名和密码是否正确
 2 
 3 import getpass
 4 
 5 _username = 'zhangfei'
 6 _password = '123456'
 7 
 8 username = input('username:')
 9 password = getpass.getpass('password:')     #暗码获取密码
10 if username == _username and password == _password:
11     print('Welcome user {name} login...'.format(name = username))
12 else:
13     print('Invalid username or password')

　　3. 获得变量值的方法

>>> s = "some numbers:"
>>> x = 1.34
>>> y = 2
# 用百分号隔开，括号括起来
>>> "%s %f, %d" % (s, x, y)
'some numbers: 1.340000, 2'

>>> '{} {} {}'.format('a', 'b', 'c')
'a b c'

>>> '{2} {1} {0}'.format('a', 'b', 'c')
'c b a'

>>> '{color} {n} {x}'.format(n=10, x=1.5, color='blue')
'blue 10 1.5'

>>> from math import pi
>>> '{0:10} {1:10d} {2:10.2f}'.format('foo', 5, 2 * pi)
'foo                 5       6.28'
#参数可以嵌套，顺序由外到内
>>> 'apple={:.{}f}'.format(12.12345, 3)
apple=12.123