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)
