1 import getpass
2 #标准库里要加密密码需要导包getpass.但是getpass在pycharm中不好用,需要在命令窗口中输入才管用.
3
4 _username = "abc"
5 _password = "abc123"
6 username = input("username:")
7 # password = getpass.getpass("password:")
8 password = input("password:")
9
10 if _username==username and _password==password:
11 print("Welcome user {name} login...".format(name=username))
12 else:
13 print("invalid username or password")
1 age_of_oldboy = 56
2
3 guess_age = int(input("guess age:"))
4
5 if guess_age==age_of_oldboy:
6 print("yes, you got it.")
7 elif guess_age>age_of_oldboy:
8 print("think smaller")
9 else:
10 print("think bigger")
1 age_of_oldboy = 56
2
3 count=0
4 while True:
5 if count==3:
6 break
7 # print("count:",count)
8 guess_age = int(input("guess age:"))
9
10 if guess_age==age_of_oldboy:
11 print("yes, you got it.")
12 break
13 elif guess_age>age_of_oldboy:
14 print("think smaller")
15 else:
16 print("think bigger")
17 count=count+1 #count+=1
18 if count==3:
19 print("you have tried too many times! Fuck off!")
20
21
22 # 优化后的代码
23 while count<3:
24 guess_age = int(input("guess age:"))
25
26 if guess_age==age_of_oldboy:
27 print("yes, you got it.")
28 break
29 elif guess_age>age_of_oldboy:
30 print("think smaller")
31 else:
32 print("think bigger")
33 count=count+1 #count+=1
34 else:
35 print("you have tried too many times! Fuck off!")
1 '''
2 while循环实现
3 age_of_oldboy = 56
4
5 count=0
6 while True:
7 if count==3:
8 break
9 # print("count:",count)
10 guess_age = int(input("guess age:"))
11
12 if guess_age==age_of_oldboy:
13 print("yes, you got it.")
14 break
15 elif guess_age>age_of_oldboy:
16 print("think smaller")
17 else:
18 print("think bigger")
19 count=count+1 #count+=1
20 if count==3:
21 print("you have tried too many times! Fuck off!")
22
23
24 # 优化后的代码
25 while count<3:
26 guess_age = int(input("guess age:"))
27
28 if guess_age==age_of_oldboy:
29 print("yes, you got it.")
30 break
31 elif guess_age>age_of_oldboy:
32 print("think smaller")
33 else:
34 print("think bigger")
35 count=count+1 #count+=1
36 else:
37 print("you have tried too many times! Fuck off!")
38
39 '''
40 '''
41 for i in range(10): #range10其实是从0到9.
42 print("loop", i)
43 '''
44
45 # for循环来实现
46 age_of_oldboy = 56
47 for i in range(3):
48 guess_age = int(input("guess age:"))
49 if guess_age == age_of_oldboy:
50 print("yes, you got it")
51 break
52 elif guess_age > age_of_oldboy:
53 print("think smaller")
54 else:
55 print("think bigger")
56 else:
57 print("you have tried too many times.. fuck off!")
1 # 0到9的数字,隔一个打印一个到控制台
2 for i in range(0,10,2): #括号中的2是步长,不写的话默认是1.若想隔两个打印一uqw,则步长设置为3即可.即for i in range(0,10,3)
3 print("loop", i)
1 # 每错三次不直接跳出,而是问玩家是否要继续
2 age_of_oldboy = 56
3
4 count=0
5 while True:
6 if count==3:
7 break
8 # print("count:",count)
9 guess_age = int(input("guess age:"))
10
11 if guess_age==age_of_oldboy:
12 print("yes, you got it.")
13 break
14 elif guess_age>age_of_oldboy:
15 print("think smaller")
16 else:
17 print("think bigger")
18 count=count+1 #count+=1
19 if count==3:
20 continue_confirm = input('do you want to continue?')
21 if continue_confirm !='n':
22 count=0
23 else:
24 print("you have tried too many times! Fuck off!")
1 # continue的用法: 跳出本次循环,继续下一次循环
2 for i in range(0,10):
3 if i<5:
4 print("loop", i)
5 else:
6 continue #跳出本次循环,继续下一次循环
7 print("hehe...")
1 #break:结束当前循环
2 for i in range(10):
3 print("-----------------",i)
4 for j in range(10):
5 print(j)
6 if j>5:
7 break
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