1.branch:
example 1
if else 语句
1 #if else 2 username = "joker" 3 password = "123456" 4 in_user = input("name:") 5 in_passwd = input("password:") 6 if username == in_user and password == in_passwd : 7 print("welcome to login in...") 8 else: 9 print("username or password not correct!")
example 2
if else、if elif、while 语句
1 #little game for if else elif and while 2 user = "admin" 3 psswd = "weak1234" 4 count = 0 5 while count < 3: 6 user_name = input("name:") 7 pass_wd = input("password:") 8 if(user == user_name and psswd == pass_wd): 9 print("Oh ,your hacked my account!") 10 break 11 elif count == 2: 12 print("You have tried so many times") 13 else: 14 print("I am a strong admin ,you gays fuck off!") 15 count += 1 16 else: 17 print("You don't have any chance any more ,see you!")
example 3
for 语句 和 range() 函数
1 #for and range(start,end,steps) 2 #print the numbers from 1 to 10 3 for i in range(1,11): 4 print(i,end=" ") 5 print() 6 #print the even numbers 7 for i in range(0,11,2): 8 print(i,end=" ") 9 print() 10 #print the odd numbers 11 for i in range(1,12,2): 12 print(i,end=" ") 13 print()
example 4
不明文显示输入的密码，getpass标准库
1 #getpass 2 import getpass 3 username = input("name:") 4 password_1 = input("password:") 5 password_1 = getpass.getpass("password:") # in pycharm it doesn't work
2.格式化输出：
打印一个简单的自我介绍情况
example 1
占位符：%s、%d、%f
1 #格式化输出 2 name=input("name:") 3 age=int(input("age:")) 4 job=input("job:") 5 salary=float(input("salary:")) 6 msg1='''-----------name:%s------------ 7 name:%s 8 age:%d 9 job:%s 10 salary:%f 11 '''%(name,name,age,job,salary) 12 print（msg1）
example 2
format()函数
1 #格式化输出 2 name=input("name:") 3 age=input("age:") 4 job=input("job:") 5 salary=input("salary:") 6 msg2='''-----------name:{_name}------------ 7 name:{_name1} 8 age:{_age} 9 job:{_job} 10 salary:{_salary} 11 '''.format(_name=name,_name1=name,_age=age,_job=job,_salary=salary) 12 print(msg2)