题目描述：

 自己的提交：

class Solution: def entityParser(self, text: str) -> str: text = text.replace("&quot;","\"") text = text.replace("&apos;","\‘") text = text.replace("&amp;", "&") text = text.replace("&gt;",">") text = text.replace("&lt;", "<") text = text.replace("&frasl;","/") return text

优化：

class Solution: def entityParser(self, text: str) -> str: h = { "&amp;": "&", "&quot;": "\"", "&apos;": "\‘", "&gt;": ">", "&lt;": "<", "&frasl;": "/", } for k, v in h.items(): text = text.replace(k, v) return text

另：

class Solution(object): def entityParser(self, text): ans = [] i = 0 while i < len(text): if text[i] != ‘&‘: ans.append(text[i]) i += 1 continue else: if text[i+1:i+6] == ‘quot;‘: ans.append(‘"‘) i += 6 elif text[i+1:i+6] == ‘apos;‘: ans.append("‘") i += 6 elif text[i+1:i+5] == ‘amp;‘: ans.append(‘&‘) i += 5 elif text[i+1:i+4] == ‘gt;‘: ans.append(‘>‘) i += 4 elif text[i+1:i+4] == ‘lt;‘: ans.append(‘<‘) i += 4 elif text[i+1:i+7] == ‘frasl;‘: ans.append(‘/‘) i += 7 else: ans.append(text[i]) i += 1 return "".join(ans)

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