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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 _create_compositional_array_(expanded_chemical_formaula_string):
 """ Splits an expanded chemical formula string into an array of dictionaries containing information about each element :param expanded_chemical_formaula_string: a clean (not necessarily emperical, but without any special characters) chemical formula string, as returned by _expand_formula_() :return: an array of dictionaries """

    element_array = re.findall(
        '[A-Z][^A-Z]*',
        expanded_chemical_formaula_string)
    split_element_array = []
    for s in element_array:
        m = re.match(r"([a-zA-Z]+)([0-9\.]*)", s, re.I)
        if m:
            items = m.groups()
            if items[1] == "":
                items = (items[0], 1)
        this_e = {"symbol": items[0], "occurances": float(items[1])}

        split_element_array.append(this_e)
    return split_element_array