Python drawing ring graph method

The examples in this article share the specific code for drawing a circular graph in python for your reference. The specific content is as follows

import os
 
import pandas as pd
import matplotlib.pyplot as plt
import random
import numpy as np
 
 
# Get a list of gradient colors
def gradual(number):
 colors =[]
 h =0.00001
 gradual2 = random.uniform(0,1)
 r = gradual2
 if gradual2  =0.5:
 g = h
 b = gradual2
 else:
 g = gradual2
 b = h
 colors.append((r, g, b,1))for i inrange(number -1):
 # Greater than 0.5 is a green gradient, less than a blue gradient
 if gradual2  =0.5:
 g =1if((1- h)/ number)1else(g +(1- h)/ number)else:
 b =1if((1- h)/ number)1else(b +(1- h)/ number)
 colors.append((r, g, b,1))return colors
 
 
# Get the number of green,standardRedIndex is to change that color to red
def listGreen(number, standardRedIndex):
 colors =[]for i inrange(number):if i == standardRedIndex -1:
 colors.append('r')else:
 colors.append('#6CAD4F')return colors
 
 
# Draw a ring chart
def circularGraph(outerData, innerData, labels, standardRedIndex):
 data = pd.DataFrame([outerData, innerData], columns=labels)
 # Set the font so that it can display Chinese
 plt.rcParams['font.sans-serif']='Microsoft YaHei'
 plt.rcParams['axes.unicode_minus']= False
 plt.figure(figsize=(8,5))
 colors =gradual(len(labels))
 # Data inner loop
 plt.pie(data.iloc[1,:], radius=0.65, wedgeprops=dict(width=0.3, edgecolor='w'), colors=colors)
 # Data outer loop
 plt.pie(data.iloc[0,:], radius=1, wedgeprops=dict(width=0.3, edgecolor='w'),
 colors=listGreen(len(labels), standardRedIndex))
 # Get ax label
 ax = plt.subplot(1,1,1)
 # loc is the location, bbox_to_Anchor is the position coordinate, borderaxespad puts the legend outside frameon=False remove the legend border
 # bbox_to_y coordinate of anchor
 y =-1/40*len(labels)+0.5
 ax.legend(labels, loc=4, bbox_to_anchor=(1.3, y), borderaxespad=0., frameon=False)
 plt.show()circularGraph([30,30,20,40,20,20,40,20,20,40,20],[30,30,20,40,20,20,40,20,20,40,20],['Methiobacillus','Holdmania','Faecali','Rumen bacteria','Faecali','Faecali','Rumen bacteria','Faecali','Faecali','Rumen bacteria','Faecali'],3)

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