Run method fix

[zStupan]

• Fixed run method to prevent deadlock when running in separate thread and an exception is thrown. Discussed in Deprecation warnings #297

The run method now catches the exception and stores it in self.exception. The method bad_run can then be used to check if an exception has occured in the running of the algorithm.

[zStupan]

Should I add in a check, if the current thread is the main thread to just raise the exception?

[firefly-cpp]

Great!

Yes. You can check the current thread.

[zStupan]

Hmm this is strange
ERROR: Could not install packages due to an OSError: [Errno 2] No such file or directory: 'c:\users\runneradmin\.virtualenvs\niapy-ki639xhk\lib\site-packages

EDIT:
OK, it looks like it'll go through now.
I added a "private" function _is_main_process_or_thread() to algorithm.py which check if current process/thread is the main process/thread. It works with both python 2 and 3

[firefly-cpp]

Nice. Thank you @zStupan for all your hard work!