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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def from_file(filename="feff.inp"):
 """ Creates a Feff_tag dictionary from a PARAMETER or feff.inp file. Args: filename: Filename for either PARAMETER or feff.inp file Returns: Feff_tag object """

        with zopen(filename, "rt") as f:
            lines = list(clean_lines(f.readlines()))
        params = {}
        eels_params = []
        ieels = -1
        ieels_max = -1
        for i, line in enumerate(lines):
            m = re.match(r"([A-Z]+\d*\d*)\s*(.*)", line)
            if m:
                key = m.group(1).strip()
                val = m.group(2).strip()
                val = Tags.proc_val(key, val)
                if key not in ("ATOMS", "POTENTIALS", "END", "TITLE"):
                    if key in ["ELNES", "EXELFS"]:
                        ieels = i
                        ieels_max = ieels + 5
                    else:
                        params[key] = val
            if ieels >= 0:
                if i >= ieels and i <= ieels_max:
                    if i == ieels + 1:
                        if int(line.split()[1]) == 1:
                            ieels_max -= 1
                    eels_params.append(line)

        if eels_params:
            if len(eels_params) == 6:
                eels_keys = ['BEAM_ENERGY', 'BEAM_DIRECTION', 'ANGLES', 'MESH', 'POSITION']
            else:
                eels_keys = ['BEAM_ENERGY', 'ANGLES', 'MESH', 'POSITION']
            eels_dict = {"ENERGY": Tags._stringify_val(eels_params[0].split()[1:])}
            for k, v in zip(eels_keys, eels_params[1:]):
                eels_dict[k] = str(v)
            params[str(eels_params[0].split()[0])] = eels_dict

        return Tags(params)