Python实例1—格式化输出

老男孩教学学习笔记：

 实例1：格式化输出

# Author:Alex Li


name = input("name:")
# raw_input 2.x   input 3.x
# input 2.x =
age = int(input("age:"))  # integer
print(type(age), type(str(age) ))
job = input("job:")
salary= input("salary:")

info = '''
-------- info of  %s  -----
Name:%s
Age:%d
Job:%s
Salary:%s
''' % (name, name, age, job, salary)

info2 = '''
-------- info of {_name}  -----
Name:{_name}
Age:{_age}
Job:{_job}
Salary:{_salary}
'''.format(_name=name,
           _age=age,
           _job=job,
           _salary=salary)

info3 = '''
-------- info of {0} -----
Name:{0}
Age:{1}
Job:{2}
Salary:{3}
'''.format(name, age, job, salary)

print(info)
print(info2)
print(info3)

实例2：密码密文输入

# Author:Alex Li

import getpass

_username = 'alex'
_password = 'abc123'
username = input("username:")
# password = getpass.getpass("password:")
password = input("password:")
if _username == username and _password == password:
    print("Welcome user {name} login...".format(name=username))
else:
    print("Invalid username or password!")

实例3：

猜年龄（一次）

# Author:Alex Li
age_of_oldboy = 56
guess_age = int(input("guess age:"))

if guess_age == age_of_oldboy:
    print("yes, you got it")
elif guess_age > age_of_oldboy:
    print("think smaller ...")
else:
    print("think bigger!")

猜年龄（多次）——循环

# Author:Alex Li

age_of_oldboy = 56

count = 0
while count < 3:
    guess_age = int(input("guess age:") )
    if guess_age == age_of_oldboy:
        print("yes, you got it. ")
        break
    elif guess_age > age_of_oldboy:
        print("think smaller...")
    else:
        print("think bigger!")
    count += 1
else:
    print("you have tried too many times..bye")

循环学习：

# Author:Alex Li
'''
count = 0
while True:
    print("count:",count)
    count = count +1  #count +=1
    if count == 1000:
        break
'''
'''
for i in range(0,10):
    if i <3:
        print("loop ",i)
    else :
        continue
    print("hehe...")
'''

for i in range(10):
    print('----------',i)
    for j in range(10):
        print(j)
        if j > 5:
            break

循环结束后询问是否继续：

# Author:Alex Li

age_of_oldboy = 56

count = 0
while count < 3:
    guess_age = int(input("guess age:") )
    if guess_age == age_of_oldboy :
        print("yes, you got it. ")
        break
    elif guess_age > age_of_oldboy:
        print("think smaller...")
    else:
        print("think bigger!")
    count += 1

    if count == 3:
        countine_confirm = input("do you want to keep guessing..?")
        if countine_confirm != 'n':
            count = 0

作业：

一、编写登录接口：

　　1、输入用户名密码

　　2、认证成功后显示欢迎信息

　　3、用户名3次输入错误后，退出程序

　　4、密码3次输入错误后，锁定用户名

二、多级菜单

　　三级菜单

　　可依次选择进入各子菜单

　　所需知识点：列表、字典