Can `open` ever return, like, multiple files?

[liamhuber]

I was playing around in pyiron_atomistics.lammps.output for #1143, and I found this snippet:

with open(file_name, "r") as f:
        ...
        dfs = []
        for l in f:
            ...  # Nothing with dfs
        dfs.append(pd.read_csv(...))

    if len(dfs) == 1:
        df = dfs[0]
    else:
        df = pd.concat[dfs]

This looks super weird to me -- how is it possible that dfs can ever be anything other than length 1? I don't see anything in pandas.read_csv about returning multiple values, but even if it did I would still expect len(dfs) == 1 even if len(dfs[0]) != 1... Is this code just redundant?

[pmrv]

pd.concat[dfs] would immediately throw an error, so I don't think it was ever triggered. Ok to cut it imo.

[liamhuber]

pd.concat[dfs] would immediately throw an error, so I don't think it was ever triggered. Ok to cut it imo.

Super. This was my suspicion, but since this is supposed to be a pure refactor I wanted a second opinion before deleting so many lines!