How to change the background color of a kivy Graph?

Question

Does it exist a property similar to the one below to change the background color of a Graph in Kivy?

test.kv

Graph:
    id: my_graph_id
    border_color = (0,0,0,0) # this is valid
    background_color = (0,0,0,0) # ?? this does not exist

Answer 1

Use graph.background_color in Python code. The attribute background_color do exist for Kivy Garden Graph as shown below.

Example

main.py

from math import sin
from kivy.garden.graph import Graph, MeshLinePlot
from kivy.app import App
from kivy.uix.boxlayout import BoxLayout


class RootWidget(BoxLayout):

    def __init__(self, **kwargs):
        super(RootWidget, self).__init__(**kwargs)

        graph = Graph(xlabel='X', ylabel='Y', x_ticks_minor=5, x_ticks_major=25, y_ticks_major=1,
                      y_grid_label=True, x_grid_label=True, padding=5,
                      x_grid=True, y_grid=True, xmin=-0, xmax=100, ymin=-1, ymax=1)

        graph.background_color = 0, 0, 1, 1    # blue color

        plot = MeshLinePlot(color=[1, 0, 0, 1])
        plot.points = [(x, sin(x / 10.)) for x in range(0, 101)]
        graph.add_plot(plot)
        self.add_widget(graph)


class GraphDemo(App):
    title = "Kivy Garden Graph - background_color"

    def build(self):
        return RootWidget()


if __name__ == "__main__":
    GraphDemo().run()

Output