dwiddo / average-minimum-distance

    # Atomic types

    asym_symbols = odict.get('_atom_site_type_symbol')

    if asym_symbols is not None:

        asym_symbols_ = []

        for label in asym_symbols:

            sym = ''

            if label and label not in ('.', '?'):

                match = re.search(r'([A-Z][a-z]?)', label)

                if match is not None:

                    sym = match.group() 

            asym_symbols_.append(sym)

    else:

        asym_symbols_ = [''] * len(asym_unit)

    asym_types = [_ATOMIC_NUMBERS[s] for s in asym_symbols_]

    # Find where sites have disorder if necassary

    # Atomic types

    asym_symbols = block.get('_atom_site_type_symbol')

    if asym_symbols is not None:

        asym_symbols_ = []

        for label in asym_symbols:

            sym = ''

            if label and label not in ('.', '?'):

                match = re.search(r'([A-Z][a-z]?)', label)

                if match is not None:

                    sym = match.group() 

            asym_symbols_.append(sym)

    else:

        asym_symbols_ = [''] * len(asym_unit)

    asym_types = [_ATOMIC_NUMBERS[s] for s in asym_symbols_]

    # Find where sites have disorder if necassary