我的仪表板应用程序中有一个绘图，该绘图最初的标题位于绘图上方。但是，一旦我更新了图形，标题就会左对齐。我无法弄清楚为什么会这样，并且想知道如何防止标题移动，而是保持在剧情上方居中。这是我的破折号应用程序的代码：
import dash
import dash_core_components as dcc
import dash_html_components as html
from dash.dependencies import Input, Output, State
import plotly.graph_objs as go
from nba_api.stats.static import players
from nba_api.stats.endpoints.shotchartdetail import ShotChartDetail
court_shapes = []
outer_lines_shape = dict(
type='rect',
xref='x',
yref='y',
x0='-250',
y0='-47.5',
x1='250',
y1='422.5',
line=dict(
color='rgba(10, 10, 10, 1)',
width=1
)
)
court_shapes.append(outer_lines_shape)
hoop_shape = dict(
type='circle',
xref='x',
yref='y',
x0='7.5',
y0='7.5',
x1='-7.5',
y1='-7.5',
line=dict(
color='rgba(10, 10, 10, 1)',
width=1
)
)
court_shapes.append(hoop_shape)
backboard_shape = dict(
type='rect',
xref='x',
yref='y',
x0='-30',
y0='-7.5',
x1='30',
y1='-6.5',
line=dict(
color='rgba(10, 10, 10, 1)',
width=1
),
fillcolor='rgba(10, 10, 10, 1)'
)
court_shapes.append(backboard_shape)
outer_three_sec_shape = dict(
type='rect',
xref='x',
yref='y',
x0='-80',
y0='-47.5',
x1='80',
y1='143.5',
line=dict(
color='rgba(10, 10, 10, 1)',
width=1
)
)
court_shapes.append(outer_three_sec_shape)
inner_three_sec_shape = dict(
type='rect',
xref='x',
yref='y',
x0='-60',
y0='-47.5',
x1='60',
y1='143.5',
line=dict(
color='rgba(10, 10, 10, 1)',
width=1
)
)
court_shapes.append(inner_three_sec_shape)
left_line_shape = dict(
type='line',
xref='x',
yref='y',
x0='-220',
y0='-47.5',
x1='-220',
y1='92.5',
line=dict(
color='rgba(10, 10, 10, 1)',
width=1
)
)
court_shapes.append(left_line_shape)
right_line_shape = dict(
type='line',
xref='x',
yref='y',
x0='220',
y0='-47.5',
x1='220',
y1='92.5',
line=dict(
color='rgba(10, 10, 10, 1)',
width=1
)
)
court_shapes.append(right_line_shape)
three_point_arc_shape = dict(
type='path',
xref='x',
yref='y',
path='M -220 92.5 C -70 300, 70 300, 220 92.5',
line=dict(
color='rgba(10, 10, 10, 1)',
width=1
)
)
court_shapes.append(three_point_arc_shape)
center_circle_shape = dict(
type='circle',
xref='x',
yref='y',
x0='60',
y0='482.5',
x1='-60',
y1='362.5',
line=dict(
color='rgba(10, 10, 10, 1)',
width=1
)
)
court_shapes.append(center_circle_shape)
res_circle_shape = dict(
type='circle',
xref='x',
yref='y',
x0='20',
y0='442.5',
x1='-20',
y1='402.5',
line=dict(
color='rgba(10, 10, 10, 1)',
width=1
)
)
court_shapes.append(res_circle_shape)
free_throw_circle_shape = dict(
type='circle',
xref='x',
yref='y',
x0='60',
y0='200',
x1='-60',
y1='80',
line=dict(
color='rgba(10, 10, 10, 1)',
width=1
)
)
court_shapes.append(free_throw_circle_shape)
res_area_shape = dict(
type='circle',
xref='x',
yref='y',
x0='40',
y0='40',
x1='-40',
y1='-40',
line=dict(
color='rgba(10, 10, 10, 1)',
width=1,
dash='dot'
)
)
court_shapes.append(res_area_shape)
external_stylesheets = ['https://codepen.io/chriddyp/pen/bWLwgP.css']
app = dash.Dash(__name__, external_stylesheets=external_stylesheets)
app.layout = html.Div([
html.Div([
dcc.Graph(
id='shot-graph',
figure={
'layout': go.Layout(
title="test",
shapes= court_shapes,
height=800,
width=1000,
xaxis= dict(
showgrid=False,
range=[-300, 300],
showticklabels=False,
zeroline=False
),
yaxis= dict(
showgrid=False,
range=[-100, 500],
showticklabels=False,
zeroline=False
)
)
},
config={
'displayModeBar': False
}
),
],style = {'margin': 'auto', 'width': '50%'}),
html.Div([
dcc.Input(id='playerName-state', type='text', value='Brook Lopez'),
dcc.Input(id='season-state', type='text', value='2018-19'),
html.Button('Submit', id='button')
],style = {'margin-left': '675px'})
])
@app.callback(
Output('shot-graph', 'figure'),
[Input('button', 'n_clicks')],
state=[
State(component_id='playerName-state', component_property='value'),
State(component_id='season-state', component_property='value')]
)
def update_figure(n_clicks, playerName, season):
playerID = players.find_players_by_full_name(str(playerName))[0]['id']
shotchart_detail = ShotChartDetail(team_id = 0, player_id = playerID, season_nullable= str(season), context_measure_simple= "FGA")
shotData = shotchart_detail.get_data_frames()[0]
shotData["LOC_X"] *= -1
made_shots = shotData.loc[shotData.SHOT_MADE_FLAG == 1]
missed_shots = shotData.loc[shotData.SHOT_MADE_FLAG == 0]
fig = go.Figure()
fig.add_trace(go.Scatter(x=made_shots["LOC_X"], y=made_shots["LOC_Y"], mode='markers', marker_color="BLUE", name="Made Shot"))
fig.add_trace(go.Scatter(x=missed_shots["LOC_X"], y=missed_shots["LOC_Y"], mode='markers', marker_color="RED", name="Missed Shot"))
layout = go.Layout(
title='Shots by %s in the %s NBA season' % (playerName, season),
showlegend=False,
xaxis=dict(
showgrid=False,
range=[-300, 300],
showticklabels=False,
zeroline=False
),
yaxis=dict(
showgrid=False,
range=[-100, 500],
showticklabels=False,
zeroline=False
),
height = 800,
width = 1000,
shapes=court_shapes,
paper_bgcolor='rgba(0,0,0,0)',
plot_bgcolor='rgba(0,0,0,0)'
)
fig.update(layout=layout)
return fig
if __name__ == '__main__':
app.run_server(debug=True)
答案 0 :(得分：1)
标题变为左对齐（并且可能会发生其他各种样式变化！）的原因是，当您将初始图形定义为直的dict对象时，回调函数返回了go.Figure对象使用Plotly的新内置template。
要使go.Figure不这样做，可以将template=None传递给go.Layout构造函数。