`plotly.express.scatter_geo`: misleading argument type for the `size` argument

The documentation of the function plotly.express.scatter_geo [1] states that the size argument can be set to an integer.
When you do that, you’ll get an error similar to the following:

Traceback (most recent call last):
  File "/path/to/map.py", line 11, in <module>
    fig_map = px.scatter_geo(
  File "/path/to/miniconda3/lib/python3.8/site-packages/plotly/express/_chart_types.py", line 1031, in scatter_geo
    return make_figure(
  File "/path/to/miniconda3/lib/python3.8/site-packages/plotly/express/_core.py", line 1861, in make_figure
    args = build_dataframe(args, constructor)
  File "/path/to/miniconda3/lib/python3.8/site-packages/plotly/express/_core.py", line 1377, in build_dataframe
    df_output, wide_id_vars = process_args_into_dataframe(
  File "/path/to/miniconda3/lib/python3.8/site-packages/plotly/express/_core.py", line 1183, in process_args_into_dataframe
    raise ValueError(err_msg)
ValueError: Value of 'size' is not the name of a column in 'data_frame'. Expected one of ['col_name_1', 'col_name_2', 'col_name_3'] but received: 20

After some research, [2] [3] I found out that the correct way of doing this is via the method fig.update_traces(marker=dict(size=20))
So, we need to update the documentation to avoid obsolete and misleading argument types

[nicolaskruchten]

Yeah, I should really document both the “integers are interpreted as col names” and “px.Constant is a valid input” in the docstrings. Thanks for the nudge 😃

[nicolaskruchten]

Yes: https://plotly.com/python/hover-text-and-formatting/#disabling-or-customizing-hover-of-columns-in-plotly-express