Error When the shape of matrix is not square.

[fanqiNO1]

def corrplot(data, size_scale=500, marker='s'):
corr = pd.melt(data.reset_index(), id_vars='index').replace(np.nan, 0)
corr.columns = ['x', 'y', 'value']
heatmap(
corr['x'], corr['y'],
color=corr['value'], color_range=[-1, 1],
palette=sns.diverging_palette(20, 220, n=256),
size=corr['value'].abs(), size_range=[0,1],
marker=marker,
x_order=data.columns,
y_order=data.columns[::-1],
size_scale=size_scale
)

This is the function which leads to error.
However, changing to x_order=data.index can fix the bug