《笨办法学python第三版》习题26，原错误代码及正确代码 

   #import  ex25 
 1 def break_words(stuff):
 2     """This function will break up words for us."""
 3     words = stuff.split(' ')
 4     return words
 5 
 6 def sort_words(words):
 7     """Sorts the words."""
 8     return sorted(words)
 9 
10 def print_first_word(words)   # 加上":"
11     """Prints the first word after popping it off."""
12     word = words.poop(0)  #pop(0)
13     print word
14 
15 def print_last_word(words):
16     """Prints the last word after popping it off."""
17     word = words.pop(-1   #加上“）”
18     print word
19 
20 def sort_sentence(sentence):
21     """Takes in a full sentence and returns the sorted words."""
22     words = break_words(sentence)
23     return sort_words(words)
24 
25 def print_first_and_last(sentence):
26     """Prints the first and last words of the sentence."""
27     words = break_words(sentence)
28     print_first_word(words)
29     print_last_word(words)
30 
31 def print_first_and_last_sorted(sentence):
32     """Sorts the words then prints the first and last one."""
33     words = sort_sentence(sentence)
34     print_first_word(words)
35     print_last_word(words)
36 
37 print "Let's practice everything."
38 print 'You\'d need to know \'bout escapes with \\ that do \n newlines and \t tabs.'
39 
40 poem = """
41 \tThe lovely world
42 with logic so firmly planted
43 cannot discern \n the needs of love
44 nor comprehend passion from intuition
45 and requires an explantion
46 \n\t\twhere there is none.
47 """
48 
49 print "--------------"
50 print poem
51 print "--------------"
52 
53 five = 10 - 2 + 3 - 5
54 print "This should be five: %s" % five
55 
56 def secret_formula(started):
57     jelly_beans = started * 500
58     jars = jelly_beans \ 1000  #除法是“/”
59     crates = jars / 100
60     return jelly_beans, jars, crates
61 
62 start_point = 10000
63 beans, jars, crates == secret_formula(start-point)  # jelly_beans =  start_point 
64 
65 print "With a starting point of: %d" % start_point
66 print "We'd have %d jeans, %d jars, and %d crates." % (beans, jars, crates)
67 
68 start_point = start_point / 10
69 
70 print "We can also do that this way:"
71 print "We'd have %d beans, %d jars, and %d crabapples." % secret_formula(start_pont   #  start_point)
72 
73 sentence = "All god\tthings come to those who weight."  #good things
74 
75 words = ex25.break_words(sentence)
76 sorted_words = ex25.sort_words(words)
77 
78 print_first_word(words)
79 print_last_word(words)
80 .print_first_word(sorted_words)   # 去掉print前面的 .
81 print_last_word(sorted_words)
82 sorted_words = ex25.sort_sentence(sentence)
83 prin sorted_words   # print
84 
85 print_irst_and_last(sentence)  # print print_first_and_last
86 
87    print_first_a_last_sorted(senence)   #indent print first_a_last_sorted(sentence)

正确代码：

 1 import ex25
 2 def break_words(stuff):
 3     """This function will break up words for us."""
 4     words = stuff.split(' ')
 5     return words
 6 
 7 def sort_words(words):
 8     """Sorts the words."""
 9     return sorted(words)
10 
11 def print_first_word(words):
12     """Prints the first word after popping it off."""
13     word = words.pop(0)
14     print word
15 
16 def print_last_word(words):
17     """Prints the last word after popping it off."""
18     word = words.pop(-1)
19     print word
20 
21 def sort_sentence(sentence):
22     """Takes in a full sentence and returns the sorted words."""
23     words = break_words(sentence)
24     return sort_words(words)
25 
26 def print_first_and_last(sentence):
27     """Prints the first and last words of the sentence."""
28     words = break_words(sentence)
29     print_first_word(words)
30     print_last_word(words)
31 
32 def print_first_and_last_sorted(sentence):
33     """Sorts the words then prints the first and last one."""
34     words = sort_sentence(sentence)
35     print_first_word(words)
36     print_last_word(words)
37 
38 print "Let's practice everything."
39 print 'You\'d need to know \'bout escapes with \\ that do \n newlines and \t tabs.'
40 
41 poem = """
42 \tThe lovely world
43 with logic so firmly planted
44 cannot discern \n the needs of love
45 nor comprehend passion from intuition
46 and requires an explantion
47 \n\t\twhere there is none.
48 """
49 
50 print "--------------"
51 print poem
52 print "--------------"
53 
54 five = 10 - 2 + 3 - 6
55 print "This should be five: %s" % five
56 
57 def secret_formula(started):
58     jelly_beans = started * 500
59     jars = jelly_beans / 1000
60     crates = jars / 100
61     return jelly_beans, jars, crates
62 
63 start_point = 10000
64 jelly_beans, jars, crates = secret_formula(start_point)
65 
66 print "With a starting point of: %d" % start_point
67 print "We'd have %d jeans, %d jars, and %d crates." % (jelly_beans, jars, crates)
68 
69 start_point = start_point / 10
70 
71 print "We can also do that this way:"
72 print "We'd have %d beans, %d jars, and %d crabapples." % secret_formula(start_point)
73 
74 sentence = "All god things come to those who weight."
75 
76 words = ex25.break_words(sentence)
77 sorted_words = ex25.sort_words(words)
78 
79 print_first_word(words)
80 print_last_word(words)
81 print_first_word(sorted_words)
82 print_last_word(sorted_words)
83 sorted_words = ex25.sort_sentence(sentence)
84 print sorted_words
85 
86 print print_first_and_last(sentence)
87 
88 print print_first_and_last_sorted(sentence)
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posted @ 2015-11-21 13:36  肉丝儿  阅读(1842)  评论(0)  编辑  收藏  举报