1.输入输出。
用户输入：
name = input("username:") #在py2里用raw_input输入，同input
passwd = input("password:")
age = int(input ("age:"))
输出1
print(type(age)) #输出变量类型，默认是str
print(name,passwd)
输出2
info1 = '''
------------info of ---------------
username:%s
password:%s
age:%d
'''%(name,passwd,age)
print(info1)
输出2
info2 = '''
-----------info of {_name}-----------------
username:{_name}
password:{_password}
age:{_age}
'''.format(_name=name,
_password=passwd,
_age=age,
)
print(info2)
2.getpass加密
import getpass
username = "fengxiaoli"
password = "123456"
name = input("username:")
passwd = getpass.getpass("password:") #注getpass模块在pycharm执行不成功，可以在命令行执行测试
if name == username and passwd == password:
print("welcome {_username} login".format(_username=name))
else:
print("invalid login")
3.while，for循环
#猜数字1
age = 50
count=0
while count < 3:
_age = int(input("age:"))
if _age == age :
print("you guessed right")
break
elif _age > age:
print("The number is too big")
else:
print ("The number is too small")
count +=1
else :
print("You tried too many times")
猜数字2
age = 50
for i in range(3):
_age = int(input("age:"))
if _age == age :
print("you guessed right")
break
elif _age > age:
print("The number is too big")
else:
print ("The number is too small")
else :
print("You tried too many times")
猜数字3
age = 50
count=0
while count < 3:
_age = int(input("age:"))
if _age == age :
print("you guessed right")
break
elif _age > age:
print("The number is too big")
else:
print ("The number is too small")
count +=1
if count == 3:
continue_confirm=input("do you want continue.....?")
if continue_confirm != "n":
count = 0