bolry

def max_col_widths(table):
    """
    Return a list with the widest column length in
    each column from the table.
    """
    result = []
    for column in zip(*table):
        max_ = 0
        for elem_in_column in column:
            max_ = max(len(str(elem_in_column)), max_)

bolry

# will prepend or define XPATH with the value unless it already exists
# any empty arguments will not be added
robust_prepend()
{
	case ":${XPATH-}:" in
	*:"${1-}":*) ;;
	*) XPATH="${1-}${XPATH:+${1:+:}$XPATH}"
	esac
}