plotly_API.py

 # initialize plotly credentials
    plotly_tools.set_credentials_file(username='t_amond', api_key='REDACTED')
    
    
    def update_plotly(self, url):

        fileoption = 'extend'
        time = datetime.datetime.now()
        h,t = dht.read_retry(dht.DHT22, 4)
        t = 9.0/5.0 * t + 32
        t_str = "%.2f" % t
        h_str = "%.2f" % h
 
        # Temperature graph
        trace1 = Scatter(
            x= time,
            y= t_str,
            mode='lines+markers',
            name='Temperature',
         #This makes the line path curvy (spline-y)
            line=dict(
                shape='spline'
            )
        )
 
        # Humidity graph
        trace2 = Scatter(
            x= time,
            y= h_str,
            mode='lines+markers',
            name='Humidity',
            line=dict(
                shape='spline'
            )
        )
 
        data = Data([trace1, trace2])
        #set layout
        layout = Layout(title="Terrarium Humidity & Temperature over Time")
        #initialize graph figure
        fig = Figure(data=data, layout=layout)
        #generate URL to graph webpage
        graph_url = plotly_master.plot(fig, filename='carnplantmonitor', fileopt='extend', auto_open=False)
        url = graph_url
        print("Plot.ly updated successfully.")