import numpy as np
import plotly  # plotly.__version__ == '2.0.6'
plotly.offline.init_notebook_mode()
import plotly.graph_objs as go

rows, cols = 3, 3 
data = np.random.rand(rows, cols)
py.iplot(go.Figure(
    data=[go.Heatmap(
        name="CUSTOM NAME",  # This SHOULD show up in the hoverinfo?
        x=range(rows + 1), 
        y=range(cols + 1), 
        z=data, 
        text=np.where(data < .5, '<.5', '>.5'),
        hoverinfo="name+text",  # Want to see "CUSTOM NAME"
        colorscale='Greens', reversescale=True, showscale=False
    )], 
    layout=go.Layout(
        title="Test", 
        xaxis=dict(title='X-Axis'),
        yaxis=dict(title='Y-Axis'),
    )
))