並列処理でのランタイムエラー（ if __name__ == '__main__': freeze

前提・実現したいこと

Python・プログラミング初心者なので、質問が的を得ていなかったらすみません。

画像から詩を作成する機械学習のGitHub上のプロジェクト（こちら）を試しており、

おそらく並列処理（multiprocessing）の過程でランタイムエラーが発生し、解消できなくて困っています。

発生している問題・エラーメッセージ

(py27) C:\Users\admin\img2poem\code\src>python test.py
Loading Extracting Feature Module...
Traceback (most recent call last):
  File "test.py", line 8, in <module>
    extract_feature = nn_process.create('extract_feature')
  File "C:\Users\admin\img2poem\code\src\nn_process.py", line 19, in create
    proc.start()
  File "C:\Users\admin\Anaconda3\envs\py27\lib\multiprocessing\process.py", line 130, in start
    self._popen = Popen(self)
  File "C:\Users\admin\Anaconda3\envs\py27\lib\multiprocessing\forking.py", line 277, in __init__
    dump(process_obj, to_child, HIGHEST_PROTOCOL)
  File "C:\Users\admin\Anaconda3\envs\py27\lib\multiprocessing\forking.py", line 199, in dump
    ForkingPickler(file, protocol).dump(obj)
  File "C:\Users\admin\Anaconda3\envs\py27\lib\pickle.py", line 224, in dump
    self.save(obj)
  File "C:\Users\admin\Anaconda3\envs\py27\lib\pickle.py", line 331, in save
    self.save_reduce(obj=obj, *rv)
  File "C:\Users\admin\Anaconda3\envs\py27\lib\pickle.py", line 425, in save_reduce
    save(state)
  File "C:\Users\admin\Anaconda3\envs\py27\lib\pickle.py", line 286, in save
    f(self, obj) # Call unbound method with explicit self
  File "C:\Users\admin\Anaconda3\envs\py27\lib\pickle.py", line 655, in save_dict
    self._batch_setitems(obj.iteritems())
  File "C:\Users\admin\Anaconda3\envs\py27\lib\pickle.py", line 687, in _batch_setitems
    save(v)
  File "C:\Users\admin\Anaconda3\envs\py27\lib\pickle.py", line 286, in save
    f(self, obj) # Call unbound method with explicit self
  File "C:\Users\admin\Anaconda3\envs\py27\lib\pickle.py", line 754, in save_global
    (obj, module, name))
pickle.PicklingError: Can't pickle <function pipe_process at 0x000000000358A978>: it's not found as nn_process.pipe_process

(py27) C:\Users\admin\img2poem\code\src>Loading Extracting Feature Module...
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "C:\Users\admin\Anaconda3\envs\py27\lib\multiprocessing\forking.py", line 380, in main
    prepare(preparation_data)
  File "C:\Users\admin\Anaconda3\envs\py27\lib\multiprocessing\forking.py", line 510, in prepare
    '__parents_main__', file, path_name, etc
  File "C:\Users\admin\img2poem\code\src\test.py", line 8, in <module>
    extract_feature = nn_process.create('extract_feature')
  File "C:\Users\admin\img2poem\code\src\nn_process.py", line 19, in create
    proc.start()
  File "C:\Users\admin\Anaconda3\envs\py27\lib\multiprocessing\process.py", line 130, in start
    self._popen = Popen(self)
  File "C:\Users\admin\Anaconda3\envs\py27\lib\multiprocessing\forking.py", line 258, in __init__
    cmd = get_command_line() + [rhandle]
  File "C:\Users\admin\Anaconda3\envs\py27\lib\multiprocessing\forking.py", line 358, in get_command_line
    is not going to be frozen to produce a Windows executable.''')
RuntimeError:
            Attempt to start a new process before the current process
            has finished its bootstrapping phase.

            This probably means that you are on Windows and you have
            forgotten to use the proper idiom in the main module:

                if __name__ == '__main__':
                    freeze_support()
                    ...

            The "freeze_support()" line can be omitted if the program
            is not going to be frozen to produce a Windows executable.

該当のソースコード

Python
1import nn_process
2import time
3import os
4import sys
5
6print ('Loading Extracting Feature Module...')
7extract_feature = nn_process.create('extract_feature')
8print ('Loading Generating Poem Module...')
9generate_poem = nn_process.create('generate_poem')
10
11# default path to an image
12DEFAULT_PATH = '../images/test.jpg'
13
14if sys.version_info[0] >= 3:
15    raw_input = input
16else:
17    FileNotFoundError = IOError
18
19def get_poem(image_file):
20    """Generate a poem from the image whose filename is `image_file`
21    Parameters
22    ----------
23    image_file : str
24        Path to the input image
25    Returns
26    -------
27    str
28        Generated Poem
29    """
30    # Check whether the file exists
31    assert os.path.exists(image_file), FileNotFoundError(
32            'File `{}` not found.'.format(image_file))
33    assert not os.path.isdir(image_file), FileNotFoundError(
34            'The path should be a filename instead of `{}`.'.format(image_file))
35    img_feature = extract_feature(image_file)
36    return generate_poem(img_feature)
37
38if __name__ == '__main__':
39    while 1:
40        try:
41            s = raw_input("Please input the path to an image [default='%s']: " % DEFAULT_PATH)
42            if not s:
43                # s is empty, and use the DEFAULT_PATH
44                s = DEFAULT_PATH
45            tic = time.time()
46            print ('\n' + get_poem(s)[0].replace('\n', '\n') + '\n')
47            print ("Cost Time: %f" % (time.time() - tic))
48        except Exception as e:
49            print (e)

試したこと

こちらを見て、if name == 'main':の下に freeze_support()を入れたり、
こちらを真似して、if name == 'main':以下のコードを関数main()として外で定義してから実行したり、
上記を組み合わせたりしてみたのですが、同じエラーが出続けます。

補足情報（FW/ツールのバージョンなど）

Windows10, Anaconda3
を使っています。

Python2.7の仮想環境を作って、Anaconda Promptから実行しています

どうぞよろしくお願いいたします。

quickquip

2019/09/10 03:07 編集

Tracebackを隠しているのはなぜでしょう

OMIM

2019/09/10 07:45

すみません、Tracebackをすべて載せました。よく見たら、いちどpickle.PicklingErrorが出ていて、その後再度処理がなされているようです

行動規範の内容に同意します

回答1件

解決するかわかりませんが

Python
1import nn_process
2import time
3import os
4import sys
5
6def get_poem(image_file):
7    """Generate a poem from the image whose filename is `image_file`
8    Parameters
9    ----------
10    image_file : str
11        Path to the input image
12    Returns
13    -------
14    str
15        Generated Poem
16    """
17    # Check whether the file exists
18    assert os.path.exists(image_file), FileNotFoundError(
19            'File `{}` not found.'.format(image_file))
20    assert not os.path.isdir(image_file), FileNotFoundError(
21            'The path should be a filename instead of `{}`.'.format(image_file))
22    img_feature = extract_feature(image_file)
23    return generate_poem(img_feature)
24
25if __name__ == '__main__':
26    freeze_support()
27
28    print ('Loading Extracting Feature Module...')
29    extract_feature = nn_process.create('extract_feature')
30    print ('Loading Generating Poem Module...')
31    generate_poem = nn_process.create('generate_poem')
32
33    # default path to an image
34    DEFAULT_PATH = '../images/test.jpg'
35
36    if sys.version_info[0] >= 3:
37        raw_input = input
38    else:
39        FileNotFoundError = IOError
40
41    while 1:
42        try:
43            s = raw_input("Please input the path to an image [default='%s']: " % DEFAULT_PATH)
44            if not s:
45                # s is empty, and use the DEFAULT_PATH
46                s = DEFAULT_PATH
47            tic = time.time()
48            print ('\n' + get_poem(s)[0].replace('\n', '\n') + '\n')
49            print ("Cost Time: %f" % (time.time() - tic))
50        except Exception as e:
51            print (e)
52