猜年龄、模拟超级简单登陆系统（getpass、while、if、else、elif、for）

#/usr/bin/env python
#getpass用法
import getpass
_username = "test"
_password = "passwd"

username = getpass.getpass("your name is:")
password = getpass.getpass("your passwd is:")

print(username,password)

if _username == username and _password == password:
    print("Welcome system of {name}" .format(name=username))
else:
    print("invalid username or password...")
#猜年龄（while if else elif for）
#example 1
age_of_test = 34
while True:
    guess_age = int(input("guess age:"))

    if guess_age == age_of_test:
        print("yes,you got it...")
        break
    elif guess_age > age_of_test:
        print("no,think smaller...")
    else:
        print("no,think bigger...")
#example 2
age_of_test = 34
count = 0
while True:
    if count == 3:
        break
    guess_age = int(input("guess age:"))
    if guess_age == age_of_test:
        print("yes,you got it...")
        break
    elif guess_age > age_of_test:
        print("no,think smaller...")
    else:
        print("no,think bigger...")
    count +=1
#example 3
age_of_test = 34
count = 0
while count < 3:
    guess_age = int(input("guess age:"))
    if guess_age == age_of_test:
        print("yes,you got it...")
        break
    elif guess_age > age_of_test:
        print("no,think smaller...")
    else:
        print("no,think bigger...")
    count +=1
#写法1
#if count == 3:
#写法2
else:
    print("you have tried too many times...")
#example 4
age_of_test = 34
for i in range(3):
    guess_age = int(input("guess age:"))
    if guess_age == age_of_test:
        print("yes you got it...")
        break
    elif guess_age > age_of_test:
        print("no,think smaller...")
    else:
        print("no,think bigger...")
else:
    print("you havd tried many times...")
#example 5
count = 0
age_of_test = 34

while count < 3:
    guess_age=int(input("guess age:"))
    if age_of_test == guess_age:
        print("yes,you got it...")
        break
    elif guess_age > age_of_test:
        print("no,think smaller...")
    else:
        print("no,think bigger...")
    count +=1
    if  count == 3:
        continue_confirm = input("do you want to continue thinking...
")
        if continue_confirm != "n":
            count = 0