Tukukkk

I generate an SVG file with the library MatPlotLib.

I'm trying to get a circle with black edge and white face; the face has to be not transparent. I played with the parameters edgecolor, facecolor, alpha, fill but no combination gives me what I want. Axis and lines get not covered by the circle:

import os

import locale

import matplotlib.pyplot as plt

import matplotlib.lines as mlines



files = 



# -----------------------------------------------------------------------------

class Fig:

    def __init__(self, filename, figsize = [4,4]):

        self.filename = filename 

        self.fig = plt.figure(figsize=figsize)

        self.fig.gca().axis('off')



    def save(self):

        global files

        files.append(self.filename)

        self.fig.savefig(self.filename+'.svg')





# -----------------------------------------------------------------------------

class FigNotHomeo(Fig):

    def __init__(self, filename, figsize = [4, 4]):

        Fig.__init__(self, filename, figsize)

        ax = self.fig.gca()

        ax.set_xlim(-1.1,1.1)

        ax.set_ylim(-1.05, 1.05)

        ax.axis('on')

        ax.spines['left'].set_position('center')

        ax.spines['bottom'].set_position('center')

        ax.spines['right'].set_color('none')

        ax.spines['top'].set_color('none')

        ax.xaxis.set_ticks([-1,1])

        ax.yaxis.set_ticks([-1,1])

        ax.tick_params( axis='y', labeltop= True ) # does not work

        x = [1,-1,1,0]

        y = [1,-1,-1,0]

        ax.add_line(mlines.Line2D(x,y, color='black'))

        # facecolor='white', edgecolor = 'black', fill = True, alpha=1, clip_on=True

        c = plt.Circle((0, 0), radius=0.03, facecolor='white', edgecolor = 'black',  alpha=1, fill = True, clip_on=False)

        ax.add_patch(c)



# -----------------------------------------------------------------------------

def main():

    FigNotHomeo('NotHomeo', figsize=[6, 6]).save()



if __name__== "__main__":

    main()

Patches generally have a lower zorder than lines.

import matplotlib.pyplot as plt



circle = plt.Circle((.5, .5), radius=0.2)

plt.gca().add_patch(circle)



line = plt.Line2D([0,1],[0,1], color='black')

plt.gca().add_line(line)



plt.show()

However, you may of course set the zorder to your desire.

import matplotlib.pyplot as plt



circle = plt.Circle((.5, .5), radius=0.2, zorder=3)

plt.gca().add_patch(circle)



line = plt.Line2D([0,1],[0,1], color='black', zorder=2)

plt.gca().add_line(line)



plt.show()