在PyQt5 GUI中使用Dash(plot.ly)

时间:2018-07-25 15:17:55

标签: python pyqt5 plotly

在使用由Dash创建的仪表板(使用PyQt5创建的GUI)时,我遇到了问题。

我尝试将以下示例代码作为模块以及在代码末尾:

import dash
import dash_core_components as dcc
import dash_html_components as html


def run_dash(data, layout):


   app = dash.Dash()

   app.layout = html.Div(children=[
   html.H1(children='Hello Dash'),

   html.Div(children='''
    Dash: A web application framework for Python.
   '''),

   dcc.Graph(
    id='example-graph',
    figure={
        'data': data,
        'layout': layout
    }
)
])
   app.run_server(debug=True)

但是每次遇到错误can't find '__main__' module in ''

我知道一开始,要创建Dash时要使用如下所示的主后卫:

if __name__ == '__main__':
app.run_server(debug=True)

但是我已经为MainWindow设置了一个主后卫,所以我不知道如何使两者一起工作。供参考,这是我的MainWindow主警卫:

if __name__ == '__main__':

app = QApplication(sys.argv)
mainWin = MainWindow()
mainWin.show()
sys.exit(app.exec_())

1 个答案:

答案 0 :(得分:4)

解决方案是在另一个线程中执行Dash,在另一个线程中执行Dash时可能会遇到问题,但是使用this answer会得到以下信息:

import sys

import threading

from PyQt5 import QtWidgets

import dash
import dash_core_components as dcc
import dash_html_components as html


def run_dash(data, layout):
    app = dash.Dash()

    app.layout = html.Div(children=[
        html.H1(children='Hello Dash'),

        html.Div(children='''
            Dash: A web application framework for Python.
        '''),

        dcc.Graph(
            id='example-graph',
            figure={
                'data': data,
                'layout': layout
            })
        ])
    app.run_server(debug=False)


class MainWindow(QtWidgets.QMainWindow):
    pass


if __name__ == '__main__':
    data = [
        {'x': [1, 2, 3], 'y': [4, 1, 2], 'type': 'bar', 'name': 'SF'},
        {'x': [1, 2, 3], 'y': [2, 4, 5], 'type': 'bar', 'name': u'Montréal'},
    ]

    layout = {
        'title': 'Dash Data Visualization'
    }

    threading.Thread(target=run_dash, args=(data, layout), daemon=True).start()
    app = QtWidgets.QApplication(sys.argv)
    mainWin = MainWindow()
    mainWin.show()
    sys.exit(app.exec_())