error on Windows

[hoozh]

Hi, I'm try to test on windows, meet some error, It's caused by multiprocessing, tf_io_pipline_fast_tools.py line 28.

ref to this link, I add if __name__ == '__main__': in tf_io_pipline_fast_tools.py, the error disappear， is this the right way to slove this problem?

tf_io_pipline_fast_tools.py line 28

if __name__ == '__main__':  # Add this line
    CFG = global_config.cfg

    _SAMPLE_INFO_QUEUE = Manager().Queue()
    _SENTINEL = ("", [])

Error Message

(crnntf) D:\Proj\CRNN_Tensorflow>python tools/test_shadownet.py --image_path data/test_images/img_136.jpg --weights_path crnn_synth90k/shadownet.ckpt-80000 --char_dict_path data/char_dict/char_dict_en.json --ord_map_dict_path data/char_dict/ord_map_en.json
2021-08-24 12:28:00.572316: I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully opened dynamic library cudart64_100.dll
2021-08-24 12:28:08.785860: I tensorflow/stream_executor/platform/default/dso_loader.cc:44] Successfully opened dynamic library cudart64_100.dll
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\spawn.py", line 106, in spawn_main
    exitcode = _main(fd)
  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\spawn.py", line 115, in _main
    prepare(preparation_data)
  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\spawn.py", line 226, in prepare
    _fixup_main_from_path(data['init_main_from_path'])
  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\spawn.py", line 278, in _fixup_main_from_path
    run_name="__mp_main__")
  File "D:\Anaconda3\envs\crnntf\lib\runpy.py", line 263, in run_path
    pkg_name=pkg_name, script_name=fname)
  File "D:\Anaconda3\envs\crnntf\lib\runpy.py", line 96, in _run_module_code
    mod_name, mod_spec, pkg_name, script_name)
  File "D:\Anaconda3\envs\crnntf\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "D:\Proj\CRNN_Tensorflow\tools\test_shadownet.py", line 23, in <module>
    from data_provider import tf_io_pipline_fast_tools
  **File "D:\Proj\CRNN_Tensorflow\data_provider\tf_io_pipline_fast_tools.py", line 28, in <module>
    _SAMPLE_INFO_QUEUE = Manager().Queue()**
  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\context.py", line 55, in Manager
    m.start()
  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\managers.py", line 479, in start
    self._process.start()
  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\process.py", line 105, in start
    self._popen = self._Popen(self)
  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\context.py", line 313, in _Popen
    return Popen(process_obj)
  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\popen_spawn_win32.py", line 34, in __init__
    prep_data = spawn.get_preparation_data(process_obj._name)
  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\spawn.py", line 144, in get_preparation_data
    _check_not_importing_main()
  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\spawn.py", line 137, in _check_not_importing_main
    is not going to be frozen to produce an executable.''')
RuntimeError:
        An attempt has been made to start a new process before the
        current process has finished its bootstrapping phase.

        This probably means that you are not using fork to start your
        child processes 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 an executable.
Traceback (most recent call last):
  File "tools/test_shadownet.py", line 23, in <module>
    from data_provider import tf_io_pipline_fast_tools
  File "D:\Proj\CRNN_Tensorflow\data_provider\tf_io_pipline_fast_tools.py", line 28, in <module>

  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\context.py", line 55, in Manager
    m.start()
  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\managers.py", line 483, in start
    self._address = reader.recv()
  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\connection.py", line 250, in recv
    buf = self._recv_bytes()
  File "D:\Anaconda3\envs\crnntf\lib\multiprocessing\connection.py", line 306, in _recv_bytes
    [ov.event], False, INFINITE)
KeyboardInterrupt

[MaybeShewill-CV]

@hoozh You may find solutions in closed issues :)