如果它是 stringList，我如何更新图形 x_range？

Question

我想更改散景图的 x 轴。xrange = ["Marseille", "Lyon"]plot = figure(x_range=xrange)plotSource = ColumnDataSource(data=dict(x=xrange, y=[1, 2]))bars = VBar(x="x", top="y", width=0.1, fill_color="black")plot.add_glyph(plotSource, bars)handler = show(plot, notebook_handle=True)plot.x_range = ["Marseille", "Paris"]  # how can i do thatpush_notebook(handle=handler)ValueError: expected an instance of type Range, got ['Marseille', 'Paris'] of type list我无法从列表中创建范围，我该怎么办？

Answer 1

您已经x_range在图形构造函数中设置了，稍后您将尝试设置它两次。但是你应该使用plot.x_range.factors = ["Marseille", "Paris"]：

from bokeh.plotting import show, figure

from bokeh.models import ColumnDataSource, VBar

xrange = ["Marseille", "Lyon"]

plot = figure(x_range = xrange)

plotSource = ColumnDataSource(data = dict(x = xrange, y = [1, 2]))

bars = VBar(x = "x", top = "y", width = 0.1, fill_color = "black")

plot.add_glyph(plotSource, bars)

handler = show(plot, notebook_handle = True)

plot.x_range.factors = ["Marseille", "Paris"]

show(plot)

或者，也许这是您想要的更简单的代码（使用您的source）：

from bokeh.plotting import show, figure

from bokeh.models import ColumnDataSource

xrange = ["Marseille", "Lyon"]

p = figure(x_range = xrange)

source = ColumnDataSource(data = dict(x = xrange, y = [1, 2]))

bars = p.vbar(x = "x", top = "y", source = source, width = 0.1, fill_color = "black")

show(p)