periodic_table_svg_to_json.py

# SVG file to use -> https://upload.wikimedia.org/wikipedia/commons/9/91/Tableau_p%C3%A9riodique_des_%C3%A9l%C3%A9ments.svg
# Use Pyhton 3.4

from xml.dom import minidom
import json


def main():
    """THE main function."""
    elements = {}

    with minidom.parse('./Tableau_périodique_des_éléments.svg') as dom:

        for e in dom.getElementsByTagName('text'):
            id = e.getAttribute('id')
            value = e.firstChild.nodeValue
            key = ''
            type = ''
            if 'T_e' in id and '‒' not in value:

                # Name
                if id[2] == '.':
                    type = 'name'
                    key = id.strip('fr.T_e').strip('x')
                    value = value.capitalize()

                # Symbole
                if id.endswith('s'):
                    type = 'symbole'
                    key = id.strip('T_e').strip('s')

                # Number
                if id.endswith('n'):
                    type = 'number'
                    key = id.strip('T_e').strip('n')

                # Mass
                if id.endswith('m'):
                    type = 'mass'
                    key = id.strip('T_e').strip('m')
                    value = value.strip('[').strip(']').replace(',', '.')

                # Verify if the key already exist
                if key not in elements:
                    elements[key] = {}

                # Add the value
                elements[key][type] = value

    with open('elements.json', 'w') as f:
        f.write(
            json.dumps(elements,
                       sort_keys=True,
                       ensure_ascii=False,
                       indent=2))

if __name__ == '__main__':
    main()