Matplotlib.artist.Artist.set_gid() in Python

Last Updated : 15 May, 2020

Matplotlib is a library in Python and it is numerical – mathematical extension for NumPy library. The Artist class contains Abstract base class for objects that render into a FigureCanvas. All visible elements in a figure are subclasses of Artist.

Matplotlib.artist.Artist.set_gid() Method

The set_gid() method in artist module of matplotlib library is used to set the (group) id for the artist.

Syntax: Artist.set_gid(self, gid)

Parameters: This method accepts only one parameters.

gid: This parameter is the string given as gid.

Returns: This method does not return any value.

Below examples illustrate the matplotlib.artist.Artist.set_gid() function in matplotlib:

Example 1:

python3

# Implementation of matplotlib function
from matplotlib.artist import Artist
import numpy as np
import matplotlib.pyplot as plt


y, x = np.mgrid[:5, 1:6]
poly_coords = [
    (0.25, 2.75), (3.25, 2.75),
    (2.25, 0.75), (0.25, 0.75)
]

fig, ax = plt.subplots()

cells = ax.plot(x, y, x + y, color='green')
ax.add_patch(
    plt.Polygon(poly_coords,
                color='forestgreen',
                alpha=0.5)
)

ax.margins(x=0.1, y=0.05)
ax.set_aspect('equal')

for i, t in enumerate(ax.patches):
    Artist.set_gid(t, 'patch_% d' % i)

fig.suptitle("""matplotlib.artist.Artist.set_gid()
function Example""", fontweight="bold")

plt.show()

Output:

Example 2:

python3

# Implementation of matplotlib function
from matplotlib.artist import Artist 
import numpy as np 
import matplotlib.pyplot as plt 
  
   
fig, ax = plt.subplots() 
  
circle = plt.Circle((0, 0), 5, fc ='blue') 
rect = plt.Rectangle((-5, 10), 10, 5, fc ='green') 
  
ax.add_patch(circle) 
ax.add_patch(rect) 
  
circle_tip = ax.annotate('This is a blue circle.', 
            xy =(0, 0), 
            xytext =(30, -30), 
            textcoords ='offset points', 
            color ='w', 
            ha ='left', 
            bbox = dict(boxstyle ='round, pad =.5',  
                        fc =(.1, .1, .1, .92), 
                        ec =(1., 1., 1.),  
                        lw = 1, 
                        zorder = 1), 
            ) 
  
rect_tip = ax.annotate('This is a green rectangle.', 
            xy =(-5, 10), 
            xytext =(30, 40), 
            textcoords ='offset points', 
            color ='w', 
            ha ='left', 
            bbox = dict(boxstyle ='round, pad =.5', 
                        fc =(.1, .1, .1, .92),  
                        ec =(1., 1., 1.),  
                        lw = 1, 
                        zorder = 1), 
            ) 
  
for i, t in enumerate(ax.patches): 
    Artist.set_gid(t, 'patch_% d'% i) 
  
for i, t in enumerate(ax.texts): 
    Artist.set_gid(t, 'tooltip_% d'% i) 
  
ax.set_xlim(-30, 30) 
ax.set_ylim(-30, 30) 
ax.set_aspect('equal') 

fig.suptitle("""matplotlib.artist.Artist.set_gid()
function Example""", fontweight="bold")

plt.show()