@HC-85

You can draw a disk segment or a sector as a SVG path. Hence you should define a function that returns the corresponding path, like this one defined below:

```
import numpy as np
from numpy import pi, sin, cos
import plotly.graph_objects as go
def degree2rad(degrees):
return degrees*pi/180
def disk_part(center=[0,0], radius=1, start_angle=0, end_angle=90, n=50, seg=True):
sta = degree2rad(start_angle)
ea = degree2rad(end_angle)
t = np.linspace(sta, ea, n)
x = center[0] + radius*cos(t)
y = center[1] +radius*sin(t)
path = f"M {x[0]},{y[0]}"
for xc, yc in zip(x[1:], y[1:]):
path += f" L{xc},{yc}"
if seg: #segment
return path + " Z"
else: #disk sector
return path + f" L{center[0]},{center[1]} Z" #sector
path_sect = disk_part(center=[1, 0], radius=1.5, start_angle=30, end_angle=120, seg=False)
path_segment = disk_part(center=[1,0], radius=1.75, start_angle=190, end_angle=280)
fig = go.Figure()
fig.update_layout(width=700, height=500,
xaxis_range=[0,2], yaxis_range=[-2, 2],
shapes=[dict(type="path",
path=path_sect,
fillcolor="LightPink",
line_color="Crimson"),
dict(type="path",
path=path_segment,
fillcolor="LightPink",
line_color="Crimson")
])
fig.update_yaxes(scaleanchor = "x", #IMPORTANT These yaxis settings ensure that the circle is non-deformed
scaleratio = 1)
fig.show()
```