Behavior of kwargs with scatter plot in PyPlot

General Usage
1

I am looking to understand how to pass kwargs to scatter plot using PyPlot.

My version control:

(@v1.5) pkg> st
Status `~/.julia/environments/v1.5/Project.toml`
  [c52e3926] Atom v0.12.30
  [e5e0dc1b] Juno v0.8.4
  [d330b81b] PyPlot v2.9.0
  [295af30f] Revise v3.1.14
  [44cfe95a] Pkg
  [10745b16] Statistics

This illustrates the error that I am getting:

using PyPlot
pygui(true)

## I want to set the size equal to 50 
kwargs=Dict(:s => 50)

## This works fine
figure("Plot_1")
clf()
ax=gca()
ax.scatter(1:10,1:10, s=50)

## This also works
figure("Plot_2")
clf()
ax=gca()
ax.plot(1:10,1:10, kwargs...)

##  This does not work, why? 
figure("Plot_3")
clf()
ax=gca()
ax.scatter(1:10,1:10, kwargs...)

The error message that I get for Plot_3 above is:

ERROR: LoadError: PyError ($(Expr(:escape, :(ccall(#= /home/josimar/.julia/packages/PyCall/BD546/src/pyfncall.jl:43 =# @pysym(:PyObject_Call), PyPtr, (PyPtr, PyPtr, PyPtr), o, pyargsptr, kw))))) <class 'ValueError'>
ValueError('s must be a scalar, or the same size as x and y')
  File "/home/josimar/.julia/conda/3/lib/python3.8/site-packages/matplotlib/__init__.py", line 1447, in inner
    return func(ax, *map(sanitize_sequence, args), **kwargs)
  File "/home/josimar/.julia/conda/3/lib/python3.8/site-packages/matplotlib/cbook/deprecation.py", line 411, in wrapper
    return func(*inner_args, **inner_kwargs)
  File "/home/josimar/.julia/conda/3/lib/python3.8/site-packages/matplotlib/axes/_axes.py", line 4448, in scatter
    raise ValueError("s must be a scalar, or the same size as x and y")

Let me know if anyone knows how to pass kwargs to scatter plot.