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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 _get_table_width(table_spec):
 """Calculate the width of a table based on its spec. Args ---- table_spec: str The LaTeX column specification for a table. Returns ------- int The width of a table which uses the specification supplied. """


    # Remove things like {\bfseries}
    cleaner_spec = re.sub(r'{[^}]*}', '', table_spec)

    # Remove X[] in tabu environments so they dont interfere with column count
    cleaner_spec = re.sub(r'X\[(.*?(.))\]', r'\2', cleaner_spec)
    spec_counter = Counter(cleaner_spec)

    return sum(spec_counter[l] for l in COLUMN_LETTERS)