`kw` alternative

[t-bltg]

What is the alternative to

using PyPlot
subplots(subplot_kw=Dict(:aspect=>:equal))

in Pythonplot ?

I tried all sort of Dicts or NamedTuples with Strings or Symbols, but it always error out.

ERROR: Python: TypeError: Cannot convert argument 'value' to a Julia 'String', got a 'NoneType'
Python stacktrace:
 [1] __setitem__
   @ ~/.julia/packages/PythonCall/3GRYN/src/jlwrap/dict.jl:51
 [2] subplots
   @ matplotlib.gridspec [...]/lib/python3.11/site-packages/matplotlib/gridspec.py:306
 [3] subplots
   @ matplotlib.figure [...]/lib/python3.11/site-packages/matplotlib/figure.py:894
 [4] subplots
   @ matplotlib.pyplot [...]/lib/python3.11/site-packages/matplotlib/pyplot.py:1443
Stacktrace:
 [1] pythrow()
   @ PythonCall ~/.julia/packages/PythonCall/3GRYN/src/err.jl:94
 [2] errcheck
   @ ~/.julia/packages/PythonCall/3GRYN/src/err.jl:10 [inlined]
 [3] pycallargs(f::PythonCall.Py, args::PythonCall.Py, kwargs::PythonCall.Py)
   @ PythonCall ~/.julia/packages/PythonCall/3GRYN/src/abstract/object.jl:211
 [4] pycall(::PythonCall.Py; kwargs::Base.Pairs{Symbol, Dict{String, String}, Tuple{Symbol}, NamedTuple{(:subplot_kw,), Tuple{Dict{String, String}}}})
   @ PythonCall ~/.julia/packages/PythonCall/3GRYN/src/abstract/object.jl:222
 [5] #subplots#125
   @ ~/.julia/packages/PythonPlot/3KL1U/src/PythonPlot.jl:181 [inlined]
 [6] top-level scope
   @ REPL[12]:1

[t-bltg]

Ha, this works: subplots(; subplot_kw=Dict{Any,Any}("aspect"=>"equal")), but it is quite cumbersome ...

[stevengj]

Or subplot_kw=PyDict("aspect"=>"equal"))

File an issue with PythonCall if it is not converting dictionaries the way you want.

In general, PythonCall tries harder than PyCall to preserve native Julia objects by default rather than converting them to native Python objects, but this also means that you have to call more explicit conversions.