-
Notifications
You must be signed in to change notification settings - Fork 0
/
part5.py
221 lines (164 loc) · 6.46 KB
/
part5.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
#!/usr/bin/env python2.7
"""
Exercises from partVI Learning Python, Fifth Edition by Mark Lutz
"""
import unittest
import copy
class Adder(object):
def __init__(self, data=None):
self.data = data
def __add__(self, other):
return self.add(self.data, other)
def add(self, x, y):
raise NotImplementedError
class ListAdder(Adder):
def add(self, x, y):
if all([isinstance(x, list), isinstance(y, list)]):
return x + y
class DictAdder(Adder):
def add(self, x, y):
if all([isinstance(x, dict), isinstance(y, dict)]):
x.update(y)
return x
class MyList(list):
def __init__(self, data=None):
self.data = copy.deepcopy(data) if data else []
def __add__(self, other):
if all([any([isinstance(self.data, list), isinstance(self.data, MyList)]),
any([isinstance(other, list), isinstance(other, MyList)])]):
return self.data + other
def __mul__(self, times):
return self.data * times
def __getitem__(self, offset):
return self.data[offset]
def __len__(self):
return len(self.data)
def __getslice__(self, start, end):
return self.data[start:end]
def append(self, element):
return self.data.append(element)
def __getattr__(self, name):
return getattr(self.data, name)
class MyListSub(MyList):
_counter = 0
def __init__(self, *args, **kwargs):
self.adds = 0
MyList.__init__(self, *args, **kwargs)
def __add__(self, other):
print("call to __add__")
self.adds += 1
MyListSub._counter += 1
return MyList.__add__(self, other)
def _get_counters(self):
return self._counter, self.adds
class Attrs(object):
def __getattr__(self, name):
print("fetching attribute {0}".format(name))
return self.__dict__.get(name)
def __setattr__(self, name, value):
print("set attribute {0} with value {1}".format(name, value))
self.__dict__[name] = value
def nested_traversals(struct, payload):
if any([isinstance(struct, stype) for stype in [list, dict, set]]):
for element in struct:
nested_traversals(element, payload)
else:
payload.add(struct)
class MySet(set):
def __init__(self, *args):
self._payload = set()
self._union = set()
for arg in args:
nested_traversals(arg, self._payload)
set.__init__(self, self._payload)
def union(self, *args):
for arg in args:
nested_traversals(arg, self._union)
return set(self._union)
def intersect(self, *args):
next_set = set()
previous_set = set()
result = list()
for arg in args:
nested_traversals(arg, next_set)
result.append(next_set & previous_set)
previous_set = next_set
return set(result)
class Lunch(object):
def __init__(self):
self.customer = Customer()
self.employee = Employee()
def order(self, foodName):
self.customer.placeOrder(foodName, self.employee)
def result(self):
return self.customer.getFood()
class Customer(object):
def __init__(self):
self.my_food = None
def placeOrder(self, foodName, employee):
self.my_food = employee.takeFood(foodName)
def getFood(self):
return self.my_food.name
class Employee(object):
def takeFood(self, foodName):
return Food(foodName)
class Food(object):
def __init__(self, name):
self.name = name
class TestAssigment(unittest.TestCase):
def setUp(self):
self.listAdder = ListAdder()
self.dictAdder = DictAdder()
self.myList = MyList([10, 5])
self.mySubList = MyListSub([1, 2, 3])
self.mySubList2 = MyListSub([34, 65, 73])
self.my_attrs = Attrs()
def test_list_adder(self):
self.assertIsNone(self.listAdder.add([1, 2, 3], 'aaa'))
self.assertIsNone(self.listAdder.add([1, 2, 3], 1))
self.assertEqual(self.listAdder.add([1, 2, 3], [4]), [1, 2, 3, 4])
self.assertIsNone(ListAdder(10) + [1, 2, 3])
self.assertEqual(ListAdder([4]) + [1, 2, 3], [4, 1, 2, 3])
def test_list_dict(self):
self.assertIsNone(self.dictAdder.add({'key1': 1, 'key2': 2, 'key3': 3}, 'aaa'))
self.assertIsNone(self.dictAdder.add({'key1': 1, 'key2': 2, 'key3': 3}, 1))
self.assertEqual(self.dictAdder.add({'key1': 1, 'key2': 2, 'key3': 3}, {'key': 4}),
{'key1': 1, 'key2': 2, 'key3': 3, 'key': 4})
self.assertIsNone(DictAdder(10) + {'key1': 1, 'key2': 2, 'key3': 3})
self.assertEqual(DictAdder({'key': 4}) + {'key1': 1, 'key2': 2, 'key3': 3},
{'key1': 1, 'key2': 2, 'key3': 3, 'key': 4})
def test_my_list(self):
self.assertIsNone(MyList(10) + [1, 2, 3])
self.assertIsNone(MyList([10, 9, 8]) + 1)
self.assertEqual(MyList([1, 2, 3]) + [4], [1, 2, 3, 4])
self.assertEqual(MyList() + [9], [9])
self.assertEqual(MyList([10, 'data'])[1], 'data')
self.assertEqual(MyList([10, 'data']) * 3, [10, 'data', 10, 'data', 10, 'data'])
self.assertEqual(len(MyList([9, 2, 3])), 3)
self.assertEqual(MyList([9, 2, 3])[1:], [2, 3])
self.assertEqual(MyList([9, 2, 3])[::-1], [3, 2, 9])
self.myList.append(3)
self.assertEqual(self.myList[:], [10, 5, 3])
def test_my_list_sub(self):
[self.mySubList + [element] for element in range(10)]
self.assertEqual(self.mySubList._get_counters(), (10, 10))
[self.mySubList2 + [element] for element in range(20)]
self.assertEqual(self.mySubList2._get_counters(), (30, 20))
def test_attrs(self):
self.my_attrs.name = 'test'
self.assertEqual(getattr(self.my_attrs, 'name'), 'test')
self.assertIsNone(getattr(self.my_attrs, 'inexistent'))
def test_my_set(self):
self.assertEqual(MySet(1, 2, 3, ['ddd', 1, 'www'], 'mmm'), {1, 2, 3, 'ddd', 'www', 'mmm'})
result = MySet(1, 2, 3) & MySet(4, 1) & MySet(1, 50)
self.assertEqual(result, {1})
self.assertEqual(MySet(1).union(MySet([2, 3, 'ddd', 1, 'www']), MySet('mmm')),
{1, 2, 3, 'ddd', 'www', 'mmm'})
def test_composition(self):
x = Lunch()
x.order('burritos')
self.assertEqual(x.result(), 'burritos')
x.order('pizza')
self.assertEqual(x.result(), 'pizza')
if __name__ == '__main__':
unittest.main()