6.4.6 练习使用参数

 1 #!/usr/bin/env python
 2 # -*- coding:utf-8 -*-
 3 ‘‘‘
 4 def init(data):
 5     data[‘first‘] = {}
 6     data[‘middle‘] = {}
 7     data[‘last‘] = {}
 8 
 9 
10 def lookup(data, label, name):
11     return data[label].get(name)
12 
13 
14 def store(data, full_name):
15     names = full_name.split()
16     if len(names) == 2: names.insert(1, ‘‘)
17     labels = ‘first‘, ‘middle‘, ‘last‘
18     for label, name zip(labels, names):
19         people = lookup(data, label, name)
20         if people:
21             people.append(full_name)
22         else:
23             data[label][name] = [full_name]
24 
25 ‘‘‘
26 ‘‘‘
27 def story(**kwds):
28     return ‘Once upon a time, there was a ‘29            ‘%(job)s called %(name)s.‘ %kwds
30 
31 
32 print(story(job=‘king‘, name=‘Gumgy‘))  
33 params = {‘job‘: ‘language‘, ‘name‘: ‘Python‘}
34 print(story(**params))
35 
36 del params[‘job‘]
37 print story(job=‘stroke of genius‘, **params)
38 
39 ‘‘‘



40 ‘‘‘
41 def interval(start, stop=None, step=1):
42     ‘imitates range() for step >0‘
43     if stop is None:
44         start, stop = 0, start
45 
46     result =  []
47     i = start
48     while i<stop:
49         result.append(i)
50         i += step
51         print(‘i:‘,i)
52         print(result)
53 interval(10)
54 
55 PS C:\Users\tt\OneDrive - 我的云盘\allstack\socket_practise> python.exe .\basic_python_practise.py                      (‘i:‘, 1)
56 [0]
57 (‘i:‘, 2)
58 [0, 1]
59 (‘i:‘, 3)
60 [0, 1, 2]
61 (‘i:‘, 4)
62 [0, 1, 2, 3]
63 (‘i:‘, 5)
64 [0, 1, 2, 3, 4]
65 (‘i:‘, 6)
66 [0, 1, 2, 3, 4, 5]
67 (‘i:‘, 7)
68 [0, 1, 2, 3, 4, 5, 6]
69 (‘i:‘, 8)
70 [0, 1, 2, 3, 4, 5, 6, 7]
71 (‘i:‘, 9)
72 [0, 1, 2, 3, 4, 5, 6, 7, 8]
73 (‘i:‘, 10)
74 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
75 
76 ‘‘‘

‘imitates range() for step >0‘这句是起到说明的作用么