</a></span>(<span class='st'>'/path/to/a.feather'</span>, <span class='st'>'/path/to/b.feather'</span>),
    <span class='kw'>columns</span> <span class='kw'>=</span> <span class='kw pkg'>reticulate</span><span class='kw ns'>::</span><span class='fu'><a href='https://rdrr.io/pkg/reticulate/man/tuple.html'>tuple</a></span>(<span class='fl'>0L</span>, <span class='fl'>1L</span>),
    <span class='kw'>output_types</span> <span class='kw'>=</span> <span class='kw pkg'>reticulate</span><span class='kw ns'>::</sp