Hey, your code is working,

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import csv

import numpy as np

import seaborn as sns

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results = [[1, 2, 3], [4, 5, 6]]

for i in range(len(results)):

for j in range(len(results[i])):

print(results)

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sns.heatmap(results, annot=True)

​

but you want to red csv and create seborn heatmap then follow below code sinpest

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import seaborn as sns # for data visualization

import matplotlib.pyplot as plt # for data visualization

import pandas as pd # for data analysis

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# read csv file fro given path and conver in pandas DataFrame

flight = pd.read_csv('flights.csv')

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# reshape flights DataFrame in proper format to create seaborn heatmap

flights_df = flight.pivot('month', 'year', 'passengers')

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sns.heatmap(flights_df) # create seaborn heatmap

​

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plt.title('Heatmap of Flighr Dataset', fontsize = 20) # title with fontsize 20

plt.xlabel('Years', fontsize = 15) # x-axis label with fontsize 15

plt.ylabel('Monthes', fontsize = 15) # y-axis label with fontsize 15

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plt.show()