view larch_feff.py @ 0:edf7f8ccf4af draft

planemo upload for repository https://github.com/MaterialsGalaxy/larch-tools/tree/main/larch_feff commit 5be486890442dedfb327289d597e1c8110240735

import json
import re
import shutil
import sys
from pathlib import Path

from larch.xafs.feffrunner import feff6l

from pymatgen.io.cif import CifParser
from pymatgen.io.feff import Atoms, Header, Potential


def get_path_labels(paths_file):
    is_meta = True
    count = 0
    a_path = {}
    all_paths = {}
    with open(paths_file) as datfile:
        dat_lines = datfile.readlines()
        for a_line in dat_lines:
            count += 1
            if re.match("-{15}", a_line.strip()) is not None:
                is_meta = False
            elif not is_meta:
                if re.match(r"\s*\d*\s{4}\d*\s{3}", a_line) is not None:
                    if a_path:
                        all_paths[a_path["index"]] = a_path
                    line_data = a_line.split()
                    a_path = {
                        "index": line_data[0],
                        "nleg": line_data[1],
                        "degeneracy": line_data[2],
                    }
                elif (
                    re.match(r"\s{6}x\s{11}y\s{5}", a_line) is None
                ):  # ignore the intermediate headings
                    line_data = a_line.split()
                    if "label" not in a_path:
                        a_path["label"] = line_data[4].replace("'", "")
                    else:
                        a_path["label"] += "." + line_data[4].replace("'", "")
    if a_path and "index" in a_path:
        all_paths[a_path["index"]] = a_path
    return all_paths


def main(structure_file: str, file_format: dict):
    crystal_f = Path(structure_file)
    feff_dir = "feff"
    feff_inp = "feff.inp"
    header_inp = "header"
    atoms_inp = "atoms"
    potential_inp = "potential"
    path = Path(feff_dir, feff_inp)
    path.parent.mkdir(parents=True, exist_ok=True)

    if file_format["format"] == "cif":
        print(f"Parsing {crystal_f.name} and saving to {path}")
        cif_parser = CifParser(crystal_f)
        structures = cif_parser.get_structures()
        length = len(structures)
        if length != 1:
            raise ValueError(
                f"Execpted single structure in cif file but found {length}"
            )
        try:
            aborsbing_atom = int(file_format["absorbing_atom"])
        except ValueError:
            # aborsbing_atom can be int or chemical symbol
            aborsbing_atom = file_format["absorbing_atom"]

        feff_header = Header(structures[0])
        potential = Potential(structures[0], aborsbing_atom)
        atoms = Atoms(structures[0], aborsbing_atom, file_format["radius"])
        # if len(atoms.struct.sites) < len(potential.):

        # print(atoms.as_dict())
        feff_header.write_file(header_inp)
        potential.write_file(potential_inp)
        atoms.write_file(atoms_inp)
        with open(path, "w") as feff_inp_file:
            with open(header_inp) as f:
                header_text = f.read()
                print(header_text)
                feff_inp_file.write(header_text + "\n")
            with open(potential_inp) as f:
                potential_text = f.readlines()
                print(*potential_text)
                feff_inp_file.writelines(potential_text + ["\n"])
            with open(atoms_inp) as f:
                atoms_text = f.readlines()
                print(*atoms_text)
                feff_inp_file.writelines(atoms_text + ["\n"])
        if len(atoms_text) <= len(potential_text):
            print(
                "WARNING: Every potential in the structure must be represented"
                " by at least one atom, consider increasing the radius"
            )
    else:
        print(f"Copying {crystal_f.name} to {path}")
        shutil.copy(crystal_f, path)

    feff6l(folder=feff_dir, feffinp=feff_inp)

    feff_files = "files.dat"
    input_file = Path(feff_dir, feff_files)
    # the .dat data is stored in fixed width strings
    comma_positions = [13, 21, 32, 41, 48, 61]
    paths_data = []
    # get the list of paths info to assign labels to paths
    try:
        paths_info = get_path_labels(Path(feff_dir, "paths.dat"))
    except FileNotFoundError as err:
        raise FileNotFoundError(
            "paths.dat does not exist, which implies FEFF failed to run"
        ) from err

    print("Reading from: " + str(input_file))
    with open(input_file) as datfile:
        # Read until we find the line at the end of the header
        line = datfile.readline()
        while not re.match("-+", line.strip()):
            line = datfile.readline()

        # Build headers
        line = datfile.readline()
        header = ""
        start = 0
        for end in comma_positions:
            header += line[start:end] + ","
            start = end
        header += f" {'label':30s}, {'select':6s}\n"
        paths_data.append(header)

        # Read data
        line = datfile.readline()
        while line:
            data = ""
            start = 0
            for end in comma_positions[:-1]:
                data += line[start:end] + ","
                start = end

            # Last column needs padding to align
            data += line[start:-1] + "     ,"

            # Add label and select column
            path_id = int(data[5:9])
            try:
                label = paths_info[str(path_id)]["label"] + f".{path_id}"
            except KeyError as err:
                msg = f"{path_id} not in {paths_info.keys()}"
                raise KeyError(msg) from err
            data += f" {label:30s}, {0:6d}\n"
            paths_data.append(data)
            line = datfile.readline()

    with open("out.csv", "w") as out:
        out.writelines(paths_data)


if __name__ == "__main__":
    structure_file = sys.argv[1]
    input_values = json.load(open(sys.argv[2], "r", encoding="utf-8"))
    main(structure_file, input_values["format"])