我正在尝试使用python终端在代码下运行，当我在jupyter笔记本中运行时，它完全可以正常工作，但是在ubuntu终端中，它将引发错误。即使尝试在终端上运行
jupyter nbextension enable --py --sys-prefix widgetsnbextension，我仍然收到相同的错误
import matplotlib as mp
from pylab import *
from sklearn import datasets
from ipywidgets import interact, widgets
from IPython.display import display, clear_output
faces = datasets.fetch_olivetti_faces()
class Trainer:
def __init__(self):
self.results = {}
self.imgs = faces.images
self.index = 0
def increment_face(self):
if self.index + 1 >= len(self.imgs):
return self.index
else:
while str(self.index) in self.results:
print(self.index)
self.index += 1
return self.index
def record_result(self, smile=True):
self.results[str(self.index)] = smile
trainer = Trainer()
button_smile = widgets.Button(description='smile')
button_no_smile = widgets.Button(description='sad face')
def display_face(face):
clear_output()
imshow(face, cmap='gray')
axis('off')
show()
def update_smile(b):
trainer.record_result(smile=True)
trainer.increment_face()
display_face(trainer.imgs[trainer.index])
def update_no_smile(b):
trainer.record_result(smile=False)
trainer.increment_face()
display_face(trainer.imgs[trainer.index])
button_no_smile.on_click(update_no_smile)
button_smile.on_click(update_smile)
display(button_smile)
display(button_no_smile)
display_face(trainer.imgs[trainer.index])
从python终端运行时出现跟踪错误
Widget Javascript not detected. It may not be installed properly. Did you enable the widgetsnbextension? If not, then run "jupyter nbextension enable --py --sys-prefix widgetsnbextension"
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
/home/harish/anaconda3/envs/facial_env/lib/python3.4/site-packages/IPython/core/formatters.py in __call__(self, obj)
880 method = get_real_method(obj, self.print_method)
881 if method is not None:
--> 882 method()
883 return True
884
/home/harish/anaconda3/envs/facial_env/lib/python3.4/site-packages/ipywidgets/widgets/widget.py in _ipython_display_(self, **kwargs)
480 loud_error('The installed widget Javascript is the wrong version.')
481
--> 482 self._send({"method": "display"})
483 self._handle_displayed(**kwargs)
484
/home/harish/anaconda3/envs/facial_env/lib/python3.4/site-packages/ipywidgets/widgets/widget.py in _send(self, msg, buffers)
485 def _send(self, msg, buffers=None):
486 """Sends a message to the model in the front-end."""
--> 487 self.comm.send(data=msg, buffers=buffers)
488
489
/home/harish/anaconda3/envs/facial_env/lib/python3.4/site-packages/ipykernel/comm/comm.py in send(self, data, metadata, buffers)
119 """Send a message to the frontend-side version of this comm"""
120 self._publish_msg('comm_msg',
--> 121 data=data, metadata=metadata, buffers=buffers,
122 )
123
/home/harish/anaconda3/envs/facial_env/lib/python3.4/site-packages/ipykernel/comm/comm.py in _publish_msg(self, msg_type, data, metadata, buffers, **keys)
64 metadata = {} if metadata is None else metadata
65 content = json_clean(dict(data=data, comm_id=self.comm_id, **keys))
---> 66 self.kernel.session.send(self.kernel.iopub_socket, msg_type,
67 content,
68 metadata=json_clean(metadata),
AttributeError: 'NoneType' object has no attribute 'session'
<ipywidgets.widgets.widget_button.Button at 0x7f0de5ebfb38>
Widget Javascript not detected. It may not be installed properly. Did you enable the widgetsnbextension? If not, then run "jupyter nbextension enable --py --sys-prefix widgetsnbextension"
---------------------------------------------------------------------------
AttributeError Traceback (most recent call last)
/home/harish/anaconda3/envs/facial_env/lib/python3.4/site-packages/IPython/core/formatters.py in __call__(self, obj)
880 method = get_real_method(obj, self.print_method)
881 if method is not None:
--> 882 method()
883 return True
884
/home/harish/anaconda3/envs/facial_env/lib/python3.4/site-packages/ipywidgets/widgets/widget.py in _ipython_display_(self, **kwargs)
480 loud_error('The installed widget Javascript is the wrong version.')
481
--> 482 self._send({"method": "display"})
483 self._handle_displayed(**kwargs)
484
/home/harish/anaconda3/envs/facial_env/lib/python3.4/site-packages/ipywidgets/widgets/widget.py in _send(self, msg, buffers)
485 def _send(self, msg, buffers=None):
486 """Sends a message to the model in the front-end."""
--> 487 self.comm.send(data=msg, buffers=buffers)
488
489
/home/harish/anaconda3/envs/facial_env/lib/python3.4/site-packages/ipykernel/comm/comm.py in send(self, data, metadata, buffers)
119 """Send a message to the frontend-side version of this comm"""
120 self._publish_msg('comm_msg',
--> 121 data=data, metadata=metadata, buffers=buffers,
122 )
123
/home/harish/anaconda3/envs/facial_env/lib/python3.4/site-packages/ipykernel/comm/comm.py in _publish_msg(self, msg_type, data, metadata, buffers, **keys)
64 metadata = {} if metadata is None else metadata
65 content = json_clean(dict(data=data, comm_id=self.comm_id, **keys))
---> 66 self.kernel.session.send(self.kernel.iopub_socket, msg_type,
67 content,
68 metadata=json_clean(metadata),
AttributeError: 'NoneType' object has no attribute 'session'
<ipywidgets.widgets.widget_button.Button at 0x7f0ddadc2cc0>
答案 0 :(得分：0)
来自 user6764549 的评论：
Ubuntu 终端不支持交互式小部件。您需要在可以运行 Javascript 的类似“浏览器”或启用 GUI 的环境中运行它。
Jupyter notebook 不是问题，Ubuntu 终端是问题。它不支持显示图像或小部件。如果您只是想避免使用浏览器，则可以查看 Jupyter Qt console 或 Spyder。