Setting rcParams for Matplotlib plot not working with PyCall

[facusapienza21]

I currently implemented a version of plot.jl functions that allows you to pass rcParams from matplotlib to set parameters of plots. However, if well this code is correct, the changes in the rcParams file are not reflected. This is a problem involving PyCall.
See for example plot_sphere() in plot.jl

# Set default plot parameters. 
# See https://matplotlib.org/stable/users/explain/customizing.html for customizable optionsz
if !isnothing(matplotlib_rcParams)
    for (key, value) in matplotlib_rcParams
        @warn "Setting Matplotlib parameters with rcParams currently not working. See following GitHub issue: https://github.com/JuliaPy/PyPlot.jl/issues/525"
        mpl_base.rcParams[key] = value
    end
end

Notice that the mpl_base is defined in both SphereUDE.jl and config.jl