Traceback (most recent call last):


 "C:\ProgramData\Anaconda3\lib\site-packages\pip\_internal\cli\base_command.py", line 178, in main

status = self.run(options, args)


 "C:\ProgramData\Anaconda3\lib\site-packages\pip\_internal\commands\install.py", line 414, in run

use_user_site=options.use_user_site,


 "C:\ProgramData\Anaconda3\lib\site-packages\pip\_internal\req\__init__.py", line 58, in install_given_reqs

**kwargs


 "C:\ProgramData\Anaconda3\lib\site-packages\pip\_internal\req\req_install.py", line 951, in install

spinner=spinner,


 "C:\ProgramData\Anaconda3\lib\site-packages\pip\_internal\utils\misc.py", line 776, in call_subprocess

% (command_desc, proc.returncode, cwd))
pip._internal.exceptions.InstallationError: Command "'C:\ProgramData\Anaconda3\python.exe' -u -c 'import setuptools, tokenize;__file__='"'"'C:\\Users\\Kevin\\AppData\\Local\\Temp\\pip-install-amnsromw\\torch-scatter\\setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record 'C:\Users\Kevin\AppData\Local\Temp\pip-record-8bcyu92l\install-record.txt' --single-version-externally-managed --compile" failed with error code 1 in C:\Users\Kevin\AppData\Local\Temp\pip-install-amnsromw\torch-scatter\

Traceback (most recent call last):


 "/home/pymarl2/src/main.py", line 107, in <module>

ex.run_commandline(params)


 "/usr/local/lib/python3.5/dist-packages/sacred-0.7.2-py3.5.egg/sacred/experiment.py", line 250, in run_commandline

return self.run(cmd_name, config_updates, named_configs, {}, args)


 "/usr/local/lib/python3.5/dist-packages/sacred-0.7.2-py3.5.egg/sacred/experiment.py", line 199, in run

run()


 "/usr/local/lib/python3.5/dist-packages/sacred-0.7.2-py3.5.egg/sacred/run.py", line 247, in __call__

self._stop_heartbeat()


 "/usr/local/lib/python3.5/dist-packages/sacred-0.7.2-py3.5.egg/sacred/run.py", line 282, in _stop_heartbeat

self._emit_heartbeat()
# one final beat to flush pending changes


 "/usr/local/lib/python3.5/dist-packages/sacred-0.7.2-py3.5.egg/sacred/run.py", line 352, in _emit_heartbeat

result=self.result)


 "/usr/local/lib/python3.5/dist-packages/sacred-0.7.2-py3.5.egg/sacred/run.py", line 399, in _safe_call

getattr(obs, method)(**kwargs)


 "/usr/local/lib/python3.5/dist-packages/sacred-0.7.2-py3.5.egg/sacred/observers/file_storage.py", line 172, in heartbeat_event

self.run_entry['heartbeat'] = beat_time.isoformat()
TypeError: 'NoneType' object does not support item assignment