我想构建一个仪表板，其中的大部分内容（标题，图形等）都取决于用户的主要输入。
因此，我想创建许多回调，以便输出取决于用户输入。
但这似乎会导致许多错误。当前的是：“类型为'Response'的对象不可JSON序列化” 但是更笼统地说，我也在代码中寻找一些输入。
################## APP LAYOUT ##################
app.layout = html.Div(
#style={'backgroundColor': colors['background']},
children=[
html.H1('Dashboard for Visualisation',
style={
'textAlign': 'center',
'color': colors['text_black']
}),
# html.H3('Choose Analysis',
# style={
# 'textAlign': 'center',
# 'color': colors['text_black']
# }),
html.Div([
dcc.Dropdown(
id='main_dropdown',
options=[
{'label':'PCA', 'value':'PCA'},
{'label':'t-SNE', 'value':'t-SNE'}
]
)],
style={'width': '28%',
'display': 'inline-block',
'textAlign': 'center'}
),
html.Div(id='action_header'),
html.Div(id='action'),
html.Div(id='sub_action'),
html.Div(id='output_graph'),
dcc.Slider(
id='slider',
min=0,
max=55,
step=None,
value=20,
marks={
5:'5',
10:'10',
15:'15',
20:'20',
25:'25',
30:'30',
35:'35',
40:'40',
45:'45',
50:'50'
},
updatemode='drag'
)
#html.Div(id='slider_div')
])
################## CALLBACKS ##################
@app.callback(
Output(component_id='action_header', component_property='children'),
[Input(component_id='main_dropdown', component_property='value')])
def update_action_header(input):
if(input == 't-SNE'):
return html.H3("Pick labels to identify clusters",
id='action_header')
@app.callback(
Output(component_id='action', component_property='children'),
[Input(component_id='main_dropdown', component_property='value')])
def update_action_options(input):
if(input == 't-SNE'):
return dcc.Dropdown(id='gene-Dropdown',
options=[{'label': s, 'value': s}
for s in temp.keys()],
value=['IDH1','SomeGene1','SomeGene2'],
multi=True
)
@app.callback(
Output(component_id='sub_action', component_property='children'),
[Input(component_id='main_dropdown', component_property='value')])
def update_sub_action_options(input):
if (input == 't-SNE'):
return [
html.Label('Dimensions in plot'),
dcc.RadioItems(
options=[
{'label': '2D', 'value': '2'},
{'label': '3D', 'value': '3'},
],
value='2'
)
]
@app.callback(
Output(component_id='output_graph', component_property='children'),
[Input(component_id='slider', component_property='value')])
def update_graph(input): # Pull det correct dataframe
# Return graph
return dcc.Graph(
id='tsne_perplexity_plot',
figure={
'data': [
go.Scatter(
{'x': dict['perp' + str(input)]['x'],
'y': dict['perp' + str(input)]['y'],
'mode': 'markers',
'opacity': 0.7,
'marker' : {
'size': 15,
'line': {'width': 0.5, 'color': 'white'}
}
}
)
],
'layout': {
'title': "Perplexity: " + str(input),
# 'plot_bgcolor': colors['background'],
#'paper_bgcolor': colors['background'],
'font': {
'color': colors['text']
},
}
}
)
非常感谢！我真的被困住了。
注意：错误会在我第一次尝试使用下拉菜单时发生 完整回溯：
* Running on http://127.0.0.1:8050/ (Press CTRL+C to quit)
127.0.0.1 - - [26/Jun/2018 14:55:55] "GET / HTTP/1.1" 200 -
127.0.0.1 - - [26/Jun/2018 14:55:56] "GET /_dash-layout HTTP/1.1" 200 -
127.0.0.1 - - [26/Jun/2018 14:55:56] "GET /_dash-dependencies HTTP/1.1" 200 -
[2018-06-26 14:55:56,845] ERROR in app: Exception on /_dash-update-component [POST]
Traceback (most recent call last):
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1982, in wsgi_app
response = self.full_dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1614, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1517, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
raise value
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1612, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1598, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 558, in dispatch
return self.callback_map[target_id]['callback'](*args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 526, in add_context
cls=plotly.utils.PlotlyJSONEncoder),
File "/Users/kimrants/anaconda3/lib/python3.6/json/__init__.py", line 238, in dumps
**kw).encode(obj)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 161, in encode
encoded_o = super(PlotlyJSONEncoder, self).encode(o)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 199, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 257, in iterencode
return _iterencode(o, 0)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 229, in default
return _json.JSONEncoder.default(self, obj)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 180, in default
o.__class__.__name__)
TypeError: Object of type 'Response' is not JSON serializable
127.0.0.1 - - [26/Jun/2018 14:55:56] "POST /_dash-update-component HTTP/1.1" 500 -
[2018-06-26 14:55:56,859] ERROR in app: Exception on /_dash-update-component [POST]
Traceback (most recent call last):
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1982, in wsgi_app
response = self.full_dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1614, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1517, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
raise value
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1612, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1598, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 558, in dispatch
return self.callback_map[target_id]['callback'](*args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 515, in add_context
output_value = func(*args, **kwargs)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 526, in add_context
cls=plotly.utils.PlotlyJSONEncoder),
File "/Users/kimrants/anaconda3/lib/python3.6/json/__init__.py", line 238, in dumps
**kw).encode(obj)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 161, in encode
encoded_o = super(PlotlyJSONEncoder, self).encode(o)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 199, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 257, in iterencode
return _iterencode(o, 0)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 229, in default
return _json.JSONEncoder.default(self, obj)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 180, in default
o.__class__.__name__)
TypeError: Object of type 'Response' is not JSON serializable
127.0.0.1 - - [26/Jun/2018 14:55:56] "POST /_dash-update-component HTTP/1.1" 500 -
[2018-06-26 14:55:56,863] ERROR in app: Exception on /_dash-update-component [POST]
Traceback (most recent call last):
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1982, in wsgi_app
response = self.full_dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1614, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1517, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
raise value
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1612, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1598, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 558, in dispatch
return self.callback_map[target_id]['callback'](*args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 515, in add_context
output_value = func(*args, **kwargs)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 515, in add_context
output_value = func(*args, **kwargs)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 526, in add_context
cls=plotly.utils.PlotlyJSONEncoder),
File "/Users/kimrants/anaconda3/lib/python3.6/json/__init__.py", line 238, in dumps
**kw).encode(obj)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 161, in encode
encoded_o = super(PlotlyJSONEncoder, self).encode(o)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 199, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 257, in iterencode
return _iterencode(o, 0)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 229, in default
return _json.JSONEncoder.default(self, obj)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 180, in default
o.__class__.__name__)
TypeError: Object of type 'Response' is not JSON serializable
127.0.0.1 - - [26/Jun/2018 14:55:56] "POST /_dash-update-component HTTP/1.1" 500 -
127.0.0.1 - - [26/Jun/2018 14:55:56] "POST /_dash-update-component HTTP/1.1" 200 -
127.0.0.1 - - [26/Jun/2018 14:55:57] "GET /favicon.ico HTTP/1.1" 200 -
[2018-06-26 14:55:58,329] ERROR in app: Exception on /_dash-update-component [POST]
Traceback (most recent call last):
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1982, in wsgi_app
response = self.full_dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1614, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1517, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
raise value
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1612, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1598, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 558, in dispatch
return self.callback_map[target_id]['callback'](*args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 526, in add_context
cls=plotly.utils.PlotlyJSONEncoder),
File "/Users/kimrants/anaconda3/lib/python3.6/json/__init__.py", line 238, in dumps
**kw).encode(obj)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 161, in encode
encoded_o = super(PlotlyJSONEncoder, self).encode(o)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 199, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 257, in iterencode
return _iterencode(o, 0)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 229, in default
return _json.JSONEncoder.default(self, obj)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 180, in default
o.__class__.__name__)
TypeError: Object of type 'Response' is not JSON serializable
127.0.0.1 - - [26/Jun/2018 14:55:58] "POST /_dash-update-component HTTP/1.1" 500 -
[2018-06-26 14:55:58,334] ERROR in app: Exception on /_dash-update-component [POST]
Traceback (most recent call last):
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1982, in wsgi_app
response = self.full_dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1614, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1517, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
raise value
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1612, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1598, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 558, in dispatch
return self.callback_map[target_id]['callback'](*args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 515, in add_context
output_value = func(*args, **kwargs)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 526, in add_context
cls=plotly.utils.PlotlyJSONEncoder),
File "/Users/kimrants/anaconda3/lib/python3.6/json/__init__.py", line 238, in dumps
**kw).encode(obj)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 161, in encode
encoded_o = super(PlotlyJSONEncoder, self).encode(o)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 199, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 257, in iterencode
return _iterencode(o, 0)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 229, in default
return _json.JSONEncoder.default(self, obj)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 180, in default
o.__class__.__name__)
TypeError: Object of type 'Response' is not JSON serializable
127.0.0.1 - - [26/Jun/2018 14:55:58] "POST /_dash-update-component HTTP/1.1" 500 -
[2018-06-26 14:55:58,351] ERROR in app: Exception on /_dash-update-component [POST]
Traceback (most recent call last):
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1982, in wsgi_app
response = self.full_dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1614, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1517, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
raise value
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1612, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1598, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 558, in dispatch
return self.callback_map[target_id]['callback'](*args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 515, in add_context
output_value = func(*args, **kwargs)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 515, in add_context
output_value = func(*args, **kwargs)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 526, in add_context
cls=plotly.utils.PlotlyJSONEncoder),
File "/Users/kimrants/anaconda3/lib/python3.6/json/__init__.py", line 238, in dumps
**kw).encode(obj)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 161, in encode
encoded_o = super(PlotlyJSONEncoder, self).encode(o)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 199, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 257, in iterencode
return _iterencode(o, 0)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 229, in default
return _json.JSONEncoder.default(self, obj)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 180, in default
o.__class__.__name__)
TypeError: Object of type 'Response' is not JSON serializable
127.0.0.1 - - [26/Jun/2018 14:55:58] "POST /_dash-update-component HTTP/1.1" 500 -
Object of type 'Response' is not JSON serializable[2018-06-26 15:52:04,380] ERROR in app: Exception on /_dash-update-component [POST]
Traceback (most recent call last):
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1982, in wsgi_app
response = self.full_dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1614, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1517, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
raise value
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1612, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1598, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 558, in dispatch
return self.callback_map[target_id]['callback'](*args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 526, in add_context
cls=plotly.utils.PlotlyJSONEncoder),
File "/Users/kimrants/anaconda3/lib/python3.6/json/__init__.py", line 238, in dumps
**kw).encode(obj)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 161, in encode
encoded_o = super(PlotlyJSONEncoder, self).encode(o)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 199, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 257, in iterencode
return _iterencode(o, 0)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 229, in default
return _json.JSONEncoder.default(self, obj)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 180, in default
o.__class__.__name__)
TypeError: Object of type 'Response' is not JSON serializable
127.0.0.1 - - [26/Jun/2018 15:52:04] "POST /_dash-update-component HTTP/1.1" 500 -
[2018-06-26 15:52:04,392] ERROR in app: Exception on /_dash-update-component [POST]
Traceback (most recent call last):
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1982, in wsgi_app
response = self.full_dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1614, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1517, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
raise value
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1612, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1598, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 558, in dispatch
return self.callback_map[target_id]['callback'](*args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 515, in add_context
output_value = func(*args, **kwargs)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 526, in add_context
cls=plotly.utils.PlotlyJSONEncoder),
File "/Users/kimrants/anaconda3/lib/python3.6/json/__init__.py", line 238, in dumps
**kw).encode(obj)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 161, in encode
encoded_o = super(PlotlyJSONEncoder, self).encode(o)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 199, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 257, in iterencode
return _iterencode(o, 0)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 229, in default
return _json.JSONEncoder.default(self, obj)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 180, in default
o.__class__.__name__)
TypeError: Object of type 'Response' is not JSON serializable
127.0.0.1 - - [26/Jun/2018 15:52:04] "POST /_dash-update-component HTTP/1.1" 500 -
[2018-06-26 15:52:04,402] ERROR in app: Exception on /_dash-update-component [POST]
Traceback (most recent call last):
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1982, in wsgi_app
response = self.full_dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1614, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1517, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/_compat.py", line 33, in reraise
raise value
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1612, in full_dispatch_request
rv = self.dispatch_request()
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/flask/app.py", line 1598, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 558, in dispatch
return self.callback_map[target_id]['callback'](*args)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 515, in add_context
output_value = func(*args, **kwargs)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 515, in add_context
output_value = func(*args, **kwargs)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/dash/dash.py", line 526, in add_context
cls=plotly.utils.PlotlyJSONEncoder),
File "/Users/kimrants/anaconda3/lib/python3.6/json/__init__.py", line 238, in dumps
**kw).encode(obj)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 161, in encode
encoded_o = super(PlotlyJSONEncoder, self).encode(o)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 199, in encode
chunks = self.iterencode(o, _one_shot=True)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 257, in iterencode
return _iterencode(o, 0)
File "/Users/kimrants/anaconda3/lib/python3.6/site-packages/plotly/utils.py", line 229, in default
return _json.JSONEncoder.default(self, obj)
File "/Users/kimrants/anaconda3/lib/python3.6/json/encoder.py", line 180, in default
o.__class__.__name__)
TypeError: Object of type 'Response' is not JSON serializable
127.0.0.1 - - [26/Jun/2018 15:52:04] "POST /_dash-update-component HTTP/1.1" 500 -
答案 0 :(得分：0)
您没有显示数据的样子，您的代码段没有调用所有变量，并且存在一些语法错误。让我们开始吧。
烧瓶在后台使用，但是您不必担心使用Requests中的flask或任何其他类似的模块。您只是传递html元素，而不传递可序列化的内容（如列表）。在所有回调中，如果要将对象发送到children的{{1}}属性，则它必须在列表中。例如div ==> html.H3('text here')。
我之前评论过：
[html.H3('text here')]，没有任何意义。 dict是类型函数，因此需要括号{'x': dict['perp' + str(input)]['x']而不是括号( )。另外，[ ]不是键/值对，因此'perp' + str(input)仍会引发错误
如果您保存的变量名为dict( )，请不要这样做。这是一个函数，您不想覆盖内置函数的名称。
您为两个元素赋予相同的ID。这将导致错误。您有dict和html.Div(id='action_header')。这将创建一个循环，该循环将破坏您的应用程序。
根据您上面提供的内容，我可以将这段代码组合在一起，可以正常工作。它应该接近您的需求。
html.H3("Pick labels to identify clusters", id='action_header')如果要使用破折号，我建议使用import dash
import plotly.graph_objs as go
import dash_core_components as dcc
import dash_html_components as html
from dash.dependencies import Input, Output
# I added these to make your code work. change to your variables.
app = dash.Dash()
server = app.server
temp = {'IDH1':1,'SomeGene1':2,'SomeGene2':3, "option3":4, "another":5}
colors = {'text':"#666", 'text_black':'#000000'}
################## APP LAYOUT ##################
app.layout = html.Div(
children=[
html.H1('Dashboard for Visualisation',
style={
'textAlign': 'center',
'color': colors['text_black']
}),
html.Div([
dcc.Dropdown(
id='main_dropdown',
options=[
{'label':'PCA', 'value':'PCA'},
{'label':'t-SNE', 'value':'t-SNE'}
]
)],
style={'width': '28%',
'display': 'inline-block',
'textAlign': 'center'}
),
html.Div(id='action_header'),
html.Div(id='action'),
html.Div(id='sub_action'),
html.Div(id='output_graph'),
dcc.Slider(
id='slider',
min=0,
max=55,
step=None,
value=20,
marks={
5:'5',
10:'10',
15:'15',
20:'20',
25:'25',
30:'30',
35:'35',
40:'40',
45:'45',
50:'50'
},
updatemode='drag'
)
])
################## CALLBACKS ##################
@app.callback(
Output(component_id='action_header', component_property='children'),
[Input(component_id='main_dropdown', component_property='value')])
def update_action_header(input):
if(input == 't-SNE'):
return [html.H3("Pick labels to identify clusters")]
@app.callback(
Output(component_id='action', component_property='children'),
[Input(component_id='main_dropdown', component_property='value')])
def update_action_options(input):
if(input == 't-SNE'):
return [dcc.Dropdown(id='gene-Dropdown',
options=[{'label': s, 'value': s}
for s in temp.keys()], # what is temp? not defined so I made something up.
value=['IDH1','SomeGene1','SomeGene2'],
multi=True
)]
@app.callback(
Output(component_id='sub_action', component_property='children'),
[Input(component_id='main_dropdown', component_property='value')])
def update_sub_action_options(input):
if (input == 't-SNE'):
return [
html.Label('Dimensions in plot'),
dcc.RadioItems(
options=[
{'label': '2D', 'value': '2'},
{'label': '3D', 'value': '3'},
],
value='2'
)
]
@app.callback(
Output(component_id='output_graph', component_property='children'),
[Input(component_id='slider', component_property='value')])
def update_graph(input): # Pull det correct dataframe
# Return graph
return [dcc.Graph(
id='tsne_perplexity_plot',
figure={
'data': [
go.Scatter(
{'x': [1, 2, 3], # put random in because I didn't
'y': [4, 8, 1], # know what your data looks like
'mode': 'markers',
'opacity': 0.7,
'marker' : {
'size': 15,
'line': {'width': 0.5, 'color': 'white'}
}
}
)
],
'layout': {
'title': "Perplexity: "+str(input),
'font': {
'color': colors['text']
},
}
}
)]
if __name__ == '__main__':
"""
If this file is ran by command line it will start the flask server
"""
app.run_server(debug = False, port = 8050) # Set debug = True when developing
而不是导入图形对象。其实并不重要，但是Dash很好地将所有内容包装在一起，因此您不必使用trace = {'type':'scatter', ...}和dict()并使用其他子模块。在Python中，不对if语句使用括号也很普遍。
{ }阅读here了解样式指南。 PEP8也很受欢迎。样式指南将帮助您的代码变得更具可读性，并防止您犯傻的错误。
最后，# bad
if (x == 5):
# do foo
# good
if x == 5:
# do foo
实际上是python中的一个函数，您不应在回调中将其用作变量。请参阅input()的文档。您不应覆盖或使用内置函数或变量作为变量或函数的名称。这会使读者感到困惑，并可能导致代码错误。