调用更新功能时,Python Bokeh图显示两行

时间:2018-08-06 04:39:53

标签: python visualization updates bokeh linegraph

我一直在使用python bokeh功能,当股票行情输入到TextInput部分时,我希望显示一张股票图。但是,就我而言,我完成这项工作的唯一方法是在更新函数中创建一个新的p.line,它将一个股票图覆盖在另一个股票图上。有没有一种方法可以更新我的源数据或更新功能,以便只显示输入库存的图形?

p=figure(
    height=400,
    x_axis_type='datetime',
    title=(company+' ('+tickerstring+') '),
    tools='pan, box_zoom, wheel_zoom, reset',
)


p.line('x', 'y', source=source)
line1=p.line(thedates, stockcloseprices)

p.grid.grid_line_color="white"
p.xaxis.axis_label = 'Date'
p.yaxis.axis_label = 'Price'
p.add_tools(HoverTool(
    tooltips=[
        ("Date", "@x{%F}"),
        ('Close',"@y")
    ],
    formatters={
        'x':'datetime', # use 'datetime' formatter for 'date' field
    },
    mode='vline'
))


source = ColumnDataSource(data=dict(
        x=thedates,
        y=stockcloseprices
        ))


div = Div(text='<br><b> Key Points </b><br><br>'+percentagechange+'<br><br>'+performance,
width=200, height=100)


def update(f):
    fstocksymbol=str(f.upper())
    if fstocksymbol in stocksymbols:
        p.title.text = (symbolsdictionary[fstocksymbol]).upper()+' ('+fstocksymbol+')'
        tickerstring=fstocksymbol
        firstfunction=stockname(tickerstring)
        secondfunction=stockdata(firstfunction)
        stockdates=[]
        stockcloseprices=[]
        for value in secondfunction:
            stockdates.append(value[0])
            stockcloseprices.append(value[4])
        thedates = np.array(stockdates, dtype=np.datetime64)
        p.line(thedates, stockcloseprices)
        push_notebook()
    elif fstocksymbol=='':
        print('')
    else:
        print("")

interact(update, f='')



grid = gridplot([p, div, button], ncols=2, plot_width=570, plot_height=400)
show(grid, notebook_handle=True)

1 个答案:

答案 0 :(得分:0)

有几个示例笔记本,它们显示了如何在GitHub上的examples目录中为现有字形更新数据源:

https://github.com/bokeh/bokeh/tree/master/examples/howto/notebook_comms

简而言之,您要更新数据源:

source.data = new_data_dict
push_notebook()