Undesirable Conversion of Unicode Keyword Arguments

[johnzl-777]

Affects: JuliaCall

Describe the bug
The Bloqade.jl library has a function rydberg_h that has several keyword arguments using unicode characters.

The following bug was discovered where one of those keyword arguments is a U+03D5 phi but at some point juliacall seems to turn that into a U+03C6 phi, causing Julia to complain that theres no function that matches rydberg_h.

A minimal working example would be the following (assuming Bloqade.jl is already installed in the Julia environment):

from juliacall import Main as jl
from juliacall import Pkg as jlPkg
from math import pi

jl.seval("using Bloqade")

atoms = jl.Bloqade.generate_sites(jl.Bloqade.SquareLattice(), 3, 4, scale=4.5)
hamiltonian = jl.Bloqade.rydberg_h(atoms, Ω=4*2*pi, Δ=10*2*pi, ϕ=0.0)

Which produces the following error:

---------------------------------------------------------------------------
JuliaError                                Traceback (most recent call last)
Cell In[4], line 4
      1 jl.seval("using Bloqade")
      3 atoms = jl.Bloqade.generate_sites(jl.Bloqade.SquareLattice(), 3, 4, scale=4.5)
----> 4 hamiltonian = jl.Bloqade.rydberg_h(atoms, Ω=4*2*pi, Δ=10*2*pi, ϕ=0.0)

File [~/.julia/packages/PythonCall/1f5yE/src/jlwrap/any.jl:208](https://file+.vscode-resource.vscode-cdn.net/Users/jlong/Desktop/vrige-debug/~/.julia/packages/PythonCall/1f5yE/src/jlwrap/any.jl:208), in __call__(self, *args, **kwargs)
    206     return ValueBase.__dir__(self) + self._jl_callmethod($(pyjl_methodnum(pyjlany_dir)))
    207 def __call__(self, *args, **kwargs):
--> 208     return self._jl_callmethod($(pyjl_methodnum(pyjlany_call)), args, kwargs)
    209 def __len__(self):
    210     return self._jl_callmethod($(pyjl_methodnum(pyjlany_op(length))))

JuliaError: MethodError: no method matching rydberg_h(::AtomList{2, Float64}; φ::Float64, Ω::Float64, Δ::Float64)

Closest candidates are:
  rydberg_h(::Any; C, Ω, ϕ, Δ) got unsupported keyword argument "φ"
   @ BloqadeExpr [~/.julia/packages/BloqadeExpr/yw55x/src/interface.jl:85](https://file+.vscode-resource.vscode-cdn.net/Users/jlong/Desktop/vrige-debug/~/.julia/packages/BloqadeExpr/yw55x/src/interface.jl:85)
  rydberg_h(::Any, !Matched::Any, !Matched::Any, !Matched::Any, !Matched::Any) got unsupported keyword arguments "φ", "Ω", "Δ"
   @ BloqadeExpr [~/.julia/packages/BloqadeExpr/yw55x/src/interface.jl:89](https://file+.vscode-resource.vscode-cdn.net/Users/jlong/Desktop/vrige-debug/~/.julia/packages/BloqadeExpr/yw55x/src/interface.jl:89)

Stacktrace:
 [1] kwerr(::NamedTuple{(:φ, :Ω, :Δ), Tuple{Float64, Float64, Float64}}, ::Function, ::AtomList{2, Float64})
   @ Base [./error.jl:165](https://file+.vscode-resource.vscode-cdn.net/Users/jlong/Desktop/vrige-debug/error.jl:165)
 [2] pyjlany_call(self::typeof(rydberg_h), args_::Py, kwargs_::Py)
   @ PythonCall [~/.julia/packages/PythonCall/1f5yE/src/jlwrap/any.jl:34](https://file+.vscode-resource.vscode-cdn.net/Users/jlong/Desktop/vrige-debug/~/.julia/packages/PythonCall/1f5yE/src/jlwrap/any.jl:34)
 [3] _pyjl_callmethod(f::Any, self_::Ptr{PythonCall.C.PyObject}, args_::Ptr{PythonCall.C.PyObject}, nargs::Int64)
   @ PythonCall [~/.julia/packages/PythonCall/1f5yE/src/jlwrap/base.jl:69](https://file+.vscode-resource.vscode-cdn.net/Users/jlong/Desktop/vrige-debug/~/.julia/packages/PythonCall/1f5yE/src/jlwrap/base.jl:69)
 [4] _pyjl_callmethod(o::Ptr{PythonCall.C.PyObject}, args::Ptr{PythonCall.C.PyObject})
   @ PythonCall.C [~/.julia/packages/PythonCall/1f5yE/src/cpython/jlwrap.jl:47](https://file+.vscode-resource.vscode-cdn.net/Users/jlong/Desktop/vrige-debug/~/.julia/packages/PythonCall/1f5yE/src/cpython/jlwrap.jl:47)

Your system

• OS: Mac OS Ventura 13.3.1, M1 Pro Macbook
• Julia: 1.9.1
• Python: 3.11.3
• JuliaCall
• conda list

# Name                    Version                   Build  Channel
appnope                   0.1.3              pyhd8ed1ab_0    conda-forge
asttokens                 2.2.1              pyhd8ed1ab_0    conda-forge
backcall                  0.2.0              pyh9f0ad1d_0    conda-forge
backports                 1.0                pyhd8ed1ab_3    conda-forge
backports.functools_lru_cache 1.6.5              pyhd8ed1ab_0    conda-forge
bzip2                     1.0.8                h620ffc9_4  
ca-certificates           2023.5.7             hf0a4a13_0    conda-forge
contourpy                 1.1.0                    pypi_0    pypi
cycler                    0.11.0                   pypi_0    pypi
debugpy                   1.5.1           py311h313beb8_0  
decorator                 5.1.1              pyhd8ed1ab_0    conda-forge
executing                 1.2.0              pyhd8ed1ab_0    conda-forge
fonttools                 4.40.0                   pypi_0    pypi
importlib-metadata        6.7.0              pyha770c72_0    conda-forge
importlib_metadata        6.7.0                hd8ed1ab_0    conda-forge
ipykernel                 6.15.0             pyh736e0ef_0    conda-forge
ipython                   8.14.0             pyhd1c38e8_0    conda-forge
jedi                      0.18.2             pyhd8ed1ab_0    conda-forge
juliacall                 0.9.13                   pypi_0    pypi
juliapkg                  0.1.10                   pypi_0    pypi
jupyter_client            8.3.0              pyhd8ed1ab_0    conda-forge
jupyter_core              5.3.0           py311hca03da5_0  
kiwisolver                1.4.4                    pypi_0    pypi
libcxx                    16.0.6               h4653b0c_0    conda-forge
libffi                    3.4.4                hca03da5_0  
libsodium                 1.0.18               h27ca646_1    conda-forge
matplotlib                3.7.1                    pypi_0    pypi
matplotlib-inline         0.1.6              pyhd8ed1ab_0    conda-forge
ncurses                   6.4                  h313beb8_0  
nest-asyncio              1.5.6              pyhd8ed1ab_0    conda-forge
numpy                     1.25.0                   pypi_0    pypi
openssl                   3.1.1                h53f4e23_1    conda-forge
packaging                 23.1               pyhd8ed1ab_0    conda-forge
parso                     0.8.3              pyhd8ed1ab_0    conda-forge
pexpect                   4.8.0              pyh1a96a4e_2    conda-forge
pickleshare               0.7.5                   py_1003    conda-forge
pillow                    9.5.0                    pypi_0    pypi
pip                       23.1.2          py311hca03da5_0  
platformdirs              3.8.0              pyhd8ed1ab_0    conda-forge
prompt-toolkit            3.0.38             pyha770c72_0    conda-forge
prompt_toolkit            3.0.38               hd8ed1ab_0    conda-forge
psutil                    5.9.0           py311h80987f9_0  
ptyprocess                0.7.0              pyhd3deb0d_0    conda-forge
pure_eval                 0.2.2              pyhd8ed1ab_0    conda-forge
pygments                  2.15.1             pyhd8ed1ab_0    conda-forge
pyparsing                 3.1.0                    pypi_0    pypi
python                    3.11.3               hb885b13_1  
python-dateutil           2.8.2              pyhd8ed1ab_0    conda-forge
pyzmq                     25.1.0          py311h313beb8_0  
readline                  8.2                  h1a28f6b_0  
semantic-version          2.10.0                   pypi_0    pypi
setuptools                67.8.0          py311hca03da5_0  
six                       1.16.0             pyh6c4a22f_0    conda-forge
sqlite                    3.41.2               h80987f9_0  
stack_data                0.6.2              pyhd8ed1ab_0    conda-forge
tk                        8.6.12               hb8d0fd4_0  
tornado                   6.2             py311h80987f9_0  
traitlets                 5.9.0              pyhd8ed1ab_0    conda-forge
typing-extensions         4.6.3                hd8ed1ab_0    conda-forge
typing_extensions         4.6.3              pyha770c72_0    conda-forge
tzdata                    2023c                h04d1e81_0  
wcwidth                   0.2.6              pyhd8ed1ab_0    conda-forge
wheel                     0.38.4          py311hca03da5_0  
xz                        5.4.2                h80987f9_0  
zeromq                    4.3.4                hbdafb3b_1    conda-forge
zipp                      3.15.0             pyhd8ed1ab_0    conda-forge
zlib                      1.2.13               h5a0b063_0  

• juliapkg.status()

  [bd27d05e] Bloqade v0.1.23
  [9a3f8284] Random

Additional context
I'm testing this in a Jupyter Notebook in VSCode with conda but the bug was originally discovered while being used in Pycharm with conda.

[johnzl-777]

I suspect this probably has something to do with this python limitation: https://pyjulia.readthedocs.io/en/stable/limitations.html#mismatch-in-valid-set-of-identifiers (not juliacall docs but I could definitely understand the same limitation across the board) in which case, is there a possible workaround without having to rewrite the function with ASCII-only (or at least, Python unicode friendly) keyword arguments?

[cjdoris]

Indeed it's the same issue as with PyJulia - python normalises unicode identifiers. I think strings aren't normalised like this so you can do

jl.Bloqade.rydberg_h(atoms, **{'Ω': 4*2*pi, 'Δ': 10*2*pi, 'ϕ': 0.0})

[johnzl-777]

This works perfectly, thanks!