How to plot seaborn heatmap on top of a background circle

[SriRajesh]

Hi,
I have below code to visualize data, and I want to ensemble a circle (heatmap inside big circle).

data is below:

helix1 phase	helix 2 phase	Energy
-0.1	-0.1	1
-0.2	-0.2	0
-0.3	-0.3	0
-0.4	-0.4	2
-0.5	-0.5	8
-0.6	-0.6	7
0.8	0.8	9
0.9	0.9	1
0	0	0
0.1	0.1	0
0.2	0.2	0
0.3	0.3	0
0.4	0.4	0
0.5	0.5	1
0.6	0.6	2
-0.8	-0.8	7
-0.9	-0.9	15

%matplotlib inline
import matplotlib.pyplot as plt
import pandas as pd
import numpy as np

helix = pd.read_csv('E:\python\heatmaptest.csv')
couple_columns = helix[['Energy','helix 2 phase', 'helix1 phase']]
phase_1_2 = couple_columns.groupby(['helix1 phase', 'helix 2 phase']).mean()
phase_1_2 = couple_columns.groupby(['helix1 phase', 'helix 2 phase']).mean()

import numpy as np;
import seaborn as sns; 

phase_1_2.pivot('helix1 phase', 'helix 2 phase','Energy').head()
phase_1_2.pivot('helix1 phase', 'helix 2 phase')['Energy'].head()



plt.figure(figsize=(9,9))
pivot_table = phase_1_2.pivot('helix1 phase', 'helix 2 phase','Energy')
plt.xlabel('helix 2 phase', size = 15)
plt.ylabel('helix1 phase', size = 15)
plt.title('Energy from Helix Phase Angles', size = 15)
sns.heatmap(pivot_table, annot=True, fmt=".1f", linewidths=.5, square = True, cmap = 'coolwarm')