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There is no point in the Scattermapbox

Hi there!
I am very new to Plotly even Python. I try to add single point to a plotly scattermapbox, it works. But when I try multiple points, it doesn’t work.
I know it might be a silly question but really confused me… lol…
Could you help me to figure out where the problem is?
I really appreciate it !
https://plot.ly/~joychen613/2

@joychen613 I inspected your code https://plot.ly/~joychen613/2/nuclear-waste-sites-on-campus/#code, and I noticed that your lon an lat lists in the trace definition are reversed. There is no lat of -122 https://www.mapbox.com/help/define-lat-lon/.

Thank very much!!!
It works!!!