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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 a(self, text, count=1):
 """ Return the appropriate indefinite article followed by text. The indefinite article is either 'a' or 'an'. If count is not one, then return count followed by text instead of 'a' or 'an'. Whitespace at the start and end is preserved. """

        mo = re.search(r"\A(\s*)(?:an?\s+)?(.+?)(\s*)\Z", text, re.IGNORECASE)
        if mo:
            word = mo.group(2)
            if not word:
                return text
            pre = mo.group(1)
            post = mo.group(3)
            result = self._indef_article(word, count)
            return "{}{}{}".format(pre, result, post)
        return ""