Hi there,

I have got through all of the data anaylsis with python course except for this one error I keep getting on this project that I cant solve.

## FAIL: test_heat_map_values (test_module.HeatMapTestCase)

Traceback (most recent call last):

File “/home/runner/boilerplate-medical-data-visualizer-4/test_module.py”, line 47, in test_heat_map_values

self.assertEqual(actual, expected, “Expected differnt values in heat map.”)

AssertionError: Lists differ: [’’, ‘’, ‘’] != [‘0.0’, ‘0.0’, ‘-0.0’, ‘0.0’, ‘-0.1’, ‘0.5’[615 chars]0.1’]

First differing element 0:

‘’

‘0.0’

Second list contains 88 additional elements.

First extra element 3:

‘0.0’

Diff is 951 characters long. Set self.maxDiff to None to see it. : Expected differnt values in heat map.

It seems like the list the test produces for comparison is not populating with any values at all. I have tried for a few days now to solve it but I am completely stumped. My code for the heatmap is as follows:

```
def draw_heat_map():
# Clean the data
dfclean = df[df['ap_lo'] <= df['ap_hi']]
dfclean = dfclean[dfclean['height'] >= dfclean['height'].quantile(0.025)]
dfclean = dfclean[dfclean['height'] <= dfclean['height'].quantile(0.975)]
dfclean = dfclean[dfclean['weight'] >= dfclean['weight'].quantile(0.025)]
dfclean = dfclean[dfclean['weight'] <= dfclean['weight'].quantile(0.975)]
# Calculate the correlation matrix
corr = dfclean.corr()
# Generate a mask for the upper triangle
mask = np.triu(np.ones_like(corr, dtype=bool))
# Set up the matplotlib figure
fig, ax = plt.subplots()
# Draw the heatmap with 'sns.heatmap()'
ax = sns.heatmap(corr, mask=mask)
# Do not modify the next two lines
fig.savefig('heatmap.png')
return fig
```

I would greatly appreciate any help with resolving this so I can finish the course!

The link to the repl.it project is: https://repl.it/@joewignell/boilerplate-medical-data-visualizer-4#medical_data_visualizer.py

Thanks in advance.