回答編集履歴
1
コード追記
test
CHANGED
|
@@ -19,3 +19,173 @@
|
|
|
19
19
|
読み出し順序の制御が必要になってくるので、
|
|
20
20
|
|
|
21
21
|
必然的に、非同期ではなく同期コードとなってしまいます。
|
|
22
|
+
|
|
23
|
+
|
|
24
|
+
|
|
25
|
+
----
|
|
26
|
+
|
|
27
|
+
コードを追記
|
|
28
|
+
|
|
29
|
+
|
|
30
|
+
|
|
31
|
+
```python
|
|
32
|
+
|
|
33
|
+
# 恐らく期待されている挙動をするコード
|
|
34
|
+
|
|
35
|
+
# Event オブジェクトでキューからの読み出しを待ちます
|
|
36
|
+
|
|
37
|
+
|
|
38
|
+
|
|
39
|
+
from multiprocessing import Process, Queue, Event
|
|
40
|
+
|
|
41
|
+
|
|
42
|
+
|
|
43
|
+
def something(queue, event):
|
|
44
|
+
|
|
45
|
+
|
|
46
|
+
|
|
47
|
+
print("1")
|
|
48
|
+
|
|
49
|
+
args = queue.get()
|
|
50
|
+
|
|
51
|
+
event.set()
|
|
52
|
+
|
|
53
|
+
print("2")
|
|
54
|
+
|
|
55
|
+
|
|
56
|
+
|
|
57
|
+
for i in range(len(args)):
|
|
58
|
+
|
|
59
|
+
|
|
60
|
+
|
|
61
|
+
args[i] = args[i]**2
|
|
62
|
+
|
|
63
|
+
|
|
64
|
+
|
|
65
|
+
queue.put(args)
|
|
66
|
+
|
|
67
|
+
|
|
68
|
+
|
|
69
|
+
|
|
70
|
+
|
|
71
|
+
if __name__ == "__main__":
|
|
72
|
+
|
|
73
|
+
|
|
74
|
+
|
|
75
|
+
event = Event()
|
|
76
|
+
|
|
77
|
+
test_list = [1, 2, 3, 4, 5, 6, 7, 8, 9]
|
|
78
|
+
|
|
79
|
+
test_queue = Queue()
|
|
80
|
+
|
|
81
|
+
test_queue.put(test_list)
|
|
82
|
+
|
|
83
|
+
|
|
84
|
+
|
|
85
|
+
p = Process(target = something, args = (test_queue, event))
|
|
86
|
+
|
|
87
|
+
|
|
88
|
+
|
|
89
|
+
p.start()
|
|
90
|
+
|
|
91
|
+
event.wait() # プロセス側で読み出されるまで待機
|
|
92
|
+
|
|
93
|
+
|
|
94
|
+
|
|
95
|
+
result = test_queue.get()
|
|
96
|
+
|
|
97
|
+
|
|
98
|
+
|
|
99
|
+
p.join()
|
|
100
|
+
|
|
101
|
+
|
|
102
|
+
|
|
103
|
+
print(result)
|
|
104
|
+
|
|
105
|
+
|
|
106
|
+
|
|
107
|
+
```
|
|
108
|
+
|
|
109
|
+
|
|
110
|
+
|
|
111
|
+
|
|
112
|
+
|
|
113
|
+
```python
|
|
114
|
+
|
|
115
|
+
# 2つのqueue を使う例
|
|
116
|
+
|
|
117
|
+
# queueA ... メインで put 子プロセスで get
|
|
118
|
+
|
|
119
|
+
# queueB ... 子プロセスで put メインで get
|
|
120
|
+
|
|
121
|
+
|
|
122
|
+
|
|
123
|
+
from multiprocessing import Process, Queue
|
|
124
|
+
|
|
125
|
+
|
|
126
|
+
|
|
127
|
+
def something(queueA, queueB):
|
|
128
|
+
|
|
129
|
+
|
|
130
|
+
|
|
131
|
+
print("1")
|
|
132
|
+
|
|
133
|
+
args = queueA.get()
|
|
134
|
+
|
|
135
|
+
print("2")
|
|
136
|
+
|
|
137
|
+
|
|
138
|
+
|
|
139
|
+
for i in range(len(args)):
|
|
140
|
+
|
|
141
|
+
|
|
142
|
+
|
|
143
|
+
args[i] = args[i]**2
|
|
144
|
+
|
|
145
|
+
|
|
146
|
+
|
|
147
|
+
queueB.put(args)
|
|
148
|
+
|
|
149
|
+
|
|
150
|
+
|
|
151
|
+
|
|
152
|
+
|
|
153
|
+
if __name__ == "__main__":
|
|
154
|
+
|
|
155
|
+
|
|
156
|
+
|
|
157
|
+
test_list = [1, 2, 3, 4, 5, 6, 7, 8, 9]
|
|
158
|
+
|
|
159
|
+
queueA = Queue()
|
|
160
|
+
|
|
161
|
+
queueB = Queue()
|
|
162
|
+
|
|
163
|
+
queueA.put(test_list)
|
|
164
|
+
|
|
165
|
+
|
|
166
|
+
|
|
167
|
+
p = Process(target = something, args = (queueA, queueB))
|
|
168
|
+
|
|
169
|
+
p.start()
|
|
170
|
+
|
|
171
|
+
|
|
172
|
+
|
|
173
|
+
result = queueB.get()
|
|
174
|
+
|
|
175
|
+
|
|
176
|
+
|
|
177
|
+
p.join()
|
|
178
|
+
|
|
179
|
+
|
|
180
|
+
|
|
181
|
+
print(result)
|
|
182
|
+
|
|
183
|
+
```
|
|
184
|
+
|
|
185
|
+
|
|
186
|
+
|
|
187
|
+
※ print() はマルチプロセスで使うには注意が必要です。
|
|
188
|
+
|
|
189
|
+
マルチプロセスでのログ出力はlogging モジュールの QueueHandler を調べて見て下さい。
|
|
190
|
+
|
|
191
|
+
https://docs.python.org/ja/3/howto/logging-cookbook.html#logging-to-a-single-file-from-multiple-processes
|