Traceback (most recent call last):


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/bin/ipython", line 11, in <module>

load_entry_point('ipython', 'console_scripts', 'ipython')()


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/src/ipython/IPython/__init__.py", line 125, in start_ipython

return launch_new_instance(argv=argv, **kwargs)


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/lib/python3.7/site-packages/traitlets/config/application.py", line 657, in launch_instance

app.initialize(argv)


 "<decorator-gen-112>", line 2, in initialize


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/lib/python3.7/site-packages/traitlets/config/application.py", line 87, in catch_config_error

return method(app, *args, **kwargs)


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/src/ipython/IPython/terminal/ipapp.py", line 317, in initialize

self.init_shell()


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/src/ipython/IPython/terminal/ipapp.py", line 333, in init_shell

ipython_dir=self.ipython_dir, user_ns=self.user_ns)


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/lib/python3.7/site-packages/traitlets/config/configurable.py", line 412, in instance

inst = cls(*args, **kwargs)


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/src/ipython/IPython/terminal/interactiveshell.py", line 450, in __init__

super(TerminalInteractiveShell, self).__init__(*args, **kwargs)


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/src/ipython/IPython/core/interactiveshell.py", line 622, in __init__

super(InteractiveShell, self).__init__(**kwargs)


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/lib/python3.7/site-packages/traitlets/config/configurable.py", line 84, in __init__

self.config = config


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/lib/python3.7/site-packages/traitlets/traitlets.py", line 585, in __set__

self.set(obj, value)


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/lib/python3.7/site-packages/traitlets/traitlets.py", line 574, in set

obj._notify_trait(self.name, old_value, new_value)


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/lib/python3.7/site-packages/traitlets/traitlets.py", line 1139, in _notify_trait

type='change',


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/lib/python3.7/site-packages/traitlets/traitlets.py", line 1176, in notify_change

c(change)


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/lib/python3.7/site-packages/traitlets/traitlets.py", line 819, in compatible_observer

return func(self, change)


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/lib/python3.7/site-packages/traitlets/config/configurable.py", line 186, in _config_changed

self._load_config(change.new, traits=traits, section_names=section_names)


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/lib/python3.7/site-packages/traitlets/config/configurable.py", line 168, in _load_config

warn(msg)


 "/Users/deankao/.pyenv/versions/3.7.0/lib/python3.7/contextlib.py", line 119, in __exit__

next(self.gen)


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/lib/python3.7/site-packages/traitlets/traitlets.py", line 1131, in hold_trait_notifications

self.notify_change(change)


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/lib/python3.7/site-packages/traitlets/traitlets.py", line 1176, in notify_change

c(change)


 "/Users/deankao/.virtualenvs/rarity-wJbxM3QZ/src/ipython/IPython/terminal/interactiveshell.py", line 150, in _editing_mode

self.pt_app.editing_mode = u_mode
AttributeError: 'NoneType' object has no attribute 'editing_mode'

Traceback (most recent call last):


 "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 772, in extract_info

return self.process_ie_result(ie_result, download, extra_info)


 "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 950, in process_ie_result

extra_info=extra)


 "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 845, in process_ie_result

new_result = info.copy()
AttributeError: 'NoneType' object has no attribute 'copy'_
