Setting rcParams fails silently

[hsgg]

I am unable to set matplotlib parameters via rcParams, e.g.

julia> using PyPlot

julia> matplotlib[:rcParams]["font.size"] = 15.0
15.0

julia> matplotlib[:rcParams]["font.size"]
10.0

This is in contrast to the equivalent code in python, which does allow me to change the font size in this manner. I find this difference in behavior surprising.

Judging by other bug reports (e.g. #114, #309), I believe this to be a regression introduced within the last year or so. (Explicitly converting rcParams to a PyDict() as in those reports doesn't make it work, either.)

On the other hand, using rc works, e.g.

julia> matplotlib[:rc]("font", size=15.0)

julia> matplotlib[:rcParams]["font.size"]
15.0

[MaxandreJ]

From memory, I've experienced the same issue.

[stevengj]

That's because matplotlib[:rcParams] currently makes a copy of the dictionary (this is the default in PyCall).

You want

rcParams = PyDict(matplotlib["rcParams"])
rcParams["font.size"] = 15