__call__() keywords must be strings

[danli349]

When I run

%%R -i adata_luminals
adata_luminals

in Jupyter, I have the error:

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-131-e227b8ec76db> in <module>
----> 1 get_ipython().run_cell_magic('R', '-i adata_luminals', 'adata_luminals\n')

~/miniconda3/lib/python3.8/site-packages/IPython/core/interactiveshell.py in run_cell_magic(self, magic_name, line, cell)
   2389             with self.builtin_trap:
   2390                 args = (magic_arg_s, cell)
-> 2391                 result = fn(*args, **kwargs)
   2392             return result
   2393 

<decorator-gen-121> in R(self, line, cell, local_ns)

~/miniconda3/lib/python3.8/site-packages/IPython/core/magic.py in <lambda>(f, *a, **k)
    185     # but it's overkill for just that one bit of state.
    186     def magic_deco(arg):
--> 187         call = lambda f, *a, **k: f(*a, **k)
    188 
    189         if callable(arg):

~/miniconda3/lib/python3.8/site-packages/rpy2/ipython/rmagic.py in R(self, line, cell, local_ns)
    735                         raise NameError("name '%s' is not defined" % input)
    736                 with localconverter(converter) as cv:
--> 737                     ro.r.assign(input, val)
    738 
    739         if args.display:

~/miniconda3/lib/python3.8/site-packages/rpy2/robjects/functions.py in __call__(self, *args, **kwargs)
    196                 v = kwargs.pop(k)
    197                 kwargs[r_k] = v
--> 198         return (super(SignatureTranslatedFunction, self)
    199                 .__call__(*args, **kwargs))
    200 

~/miniconda3/lib/python3.8/site-packages/rpy2/robjects/functions.py in __call__(self, *args, **kwargs)
    115 
    116     def __call__(self, *args, **kwargs):
--> 117         new_args = [conversion.py2rpy(a) for a in args]
    118         new_kwargs = {}
    119         for k, v in kwargs.items():

~/miniconda3/lib/python3.8/site-packages/rpy2/robjects/functions.py in <listcomp>(.0)
    115 
    116     def __call__(self, *args, **kwargs):
--> 117         new_args = [conversion.py2rpy(a) for a in args]
    118         new_kwargs = {}
    119         for k, v in kwargs.items():

~/miniconda3/lib/python3.8/functools.py in wrapper(*args, **kw)
    873                             '1 positional argument')
    874 
--> 875         return dispatch(args[0].__class__)(*args, **kw)
    876 
    877     funcname = getattr(func, '__name__', 'singledispatch function')

~/miniconda3/lib/python3.8/site-packages/anndata2ri/py2r.py in py2rpy_anndata(obj)
     61         if check_no_dupes(obj.var_names, "var_names"):
     62             row_args["row.names"] = pandas2ri.py2rpy(obj.var_names)
---> 63         row_data = s4v.DataFrame(**row_args)
     64 
     65         col_args = {k: pandas2ri.py2rpy(v) for k, v in obj.obs.items()}

TypeError: __call__() keywords must be strings

Can you please tell me why this error happens?
Thanks
Dan

[danli349]

adata_luminals_sce = anndata2ri.py2rpy(adata_luminals)

also produce the same error.