几道Python的习题

搞着玩。

1。allVowels (inString)
Returns True if all characters in inString are vowels, False otherwise. Note that an empty
string is trivially all vowels.
要求是当输入的inString里的字母都是元音的话， 执行程序后显示TRUE ，不都是的话显示FALSE。
列子：
allVowels (inString)
>>> allVowels("a")
True
>>> allVowels("a eoa")
False
>>> allVowels("iaiaa")
True

 1 #!/usr/bin/python
 2 # Filename: function1.py
 3 
 4 def allVowels( inString ) :
 5     vowels = "aeiouAEIOU";
 6     ret = True;
 7     for c in inString:
 8         if c not in vowels :
 9             ret = False;
10             break;
11     return ret;
12 
13 
14 print allVowels("a")
15 print allVowels("a eoa")
16 print allVowels("iaiaa")

 
2。average(integerList)
Returns the mean value of the integers stored in the list integerList.
要求显示输入的一组数字的平均数
列子：
average(integerList)
>>> average([5,7,8])
6.666666666666667
>>> average([10])
10.0
>>> average([1,2,3])
2.0
 

 1 #!/usr/bin/python
 2 # Filename: 2.py
 3 
 4 def average( integerList ) :
 5         sum = 0
 6         for i in integerList :
 7             sum += i
 8         num = len( integerList )
 9         if num > 0 :
10             return sum / num 
11         else :
12             return None
13 
14 
15 print average([5,7,8])
16 print average([10])
17 print average([1,2,3])
18 print average( [] )
19 

3。toBinary (integerValue)
Returns string consisting of the binary representation of integerValue.
要求把输入的10进制数字转为2进制
列子：
toBinary (integerValue)
>>> toBinary(17)
'10001'
>>> toBinary(6)
'110'
>>> toBinary(0)
'0'
>>> toBinary(1012)
'1111110100'
 

 1 #!/usr/bin/python
 2 # Filename: 3.py
 3 
 4 def toBinary (integerValue) :    
 5     str = ""
 6     tryit = True
 7     while tryit :
 8         i = integerValue % 2;
 9         if (i == 0) :
10             str = "0" + str;
11         else:
12             str = "1" + str;
13         integerValue = integerValue // 2
14         tryit = integerValue > 0;
15     return str;
16 
17 print toBinary(17)
18 print toBinary(6)
19 print toBinary(0)
20 print toBinary(1012)

4。complexPalindrome(inString)
Returns True if inString is a complex palindrome, False if it it not. A complex palindrome is
a string that is the same forwards and backwards, ignoring spaces and capitalization.
要求如果输入的字母是对称的话 （大小写和空格忽略）显示TRUE， 不是的话显示FALSE。
列子：
complexPalindrome(inString)
>>> complexPalindrome("Aha")
True
>>> complexPalindrome("AHA")
True
>>> complexPalindrome("Race car")
True
>>> complexPalindrome("a")
True
 

 1 #!/usr/bin/python
 2 # Filename: 4.py
 3 
 4 def complexPalindrome(inString) :    
 5     i=0
 6     j=-1
 7     L = len(inString)
 8     while i - j < L :
 9         if (inString[i] == " ") :
10             i += 1
11             continue
12         if (inString[j] == " ") :
13             j -= 1
14             continue
15         if inString[i].lower() != inString[j].lower() :
16             return False
17         i += 1
18         j -= 1
19         
20     return True
21     
22 print complexPalindrome("Aha")
23 print complexPalindrome("AHA")
24 print complexPalindrome("Race car")
25 print complexPalindrome("a")
26 

5。playGame()
Repeatedly issues intelligent guesses to the guessing game you built in tutorial. See below for
more detailed information.
In tutorial, you saw a game that two players play together - one player chooses the number and
the other player guesses it, and the computer tells the 2nd player if the guess was too high or too
low. Now, you will write a computer program that actually plays the game – it will make smart
guesses until it finds the right answer.
The Rules
1. The user will pick a number between 1 & 100 (but not tell the computer what it is)
2. The computer will make a guess
3. The user will tell the computer whether its guess was too high, too low, or right on
4. Steps 2 & 3 repeat until the computer guesses right, when it will output “I got it!”
要求是在0-100之间让电脑猜数字， 电脑猜了之后问你他猜的是大了还是小了， 你要输入大了小了还是对了， 一直到猜对为止。
列子：
playGame()
>>> game()
I guess 50
Am I too high (1), too low(2), or right on? (3)
1
I guess 25
Am I too high (1), too low(2), or right on? (3)
1
I guess 12
Am I too high (1), too low(2), or right on? (3)
2
I guess 18
Am I too high (1), too low(2), or right on? (3)
1
I guess 15
Am I too high (1), too low(2), or right on? (3)
2
I guess 16
Am I too high (1), too low(2), or right on? (3)
2
I guess 17
Am I too high (1), too low(2), or right on? (3)
3
I got it!

 1 #!/usr/bin/python
 2 # Filename: 5.py
 3 
 4 
 5 def playGame() :
 6     _min = 0
 7     _max = 100    
 8     while True :
 9         num = (_min + _max) // 2
10         print "I guess " + str(num)
11         print "Am I too high(1), too low(2), or right on? (3)"
12         act = int(input())
13         if act == 1 :
14             _max = num
15         elif act == 2 :
16             _min = num
17         else :
18             print "I got it!"
19             break    
20 
21     
22     
23 playGame()
24