Python如何在一个多行字符串中摘取每句最后两字? python如何在中文字符串中定位，并截取其后面的内容？详见...
python\u600e\u4e48\u6837\u83b7\u53d6\u67d0\u4e2a\u6587\u4ef6\u884c\u6307\u5b9a\u5b57\u7b26\u4e32\u540e\u9762\u7684\u5b57\u7b26\uff1f\u628a\u6bcf\u884c\u8bfb\u53d6\u540e\u53bb\u6389\u524d\u9762\u4e0d\u8981\u7684\u90e8\u5206\u5c31\u53ef\u4ee5\u4e86\uff0c\u8fd9\u79cd\u7b80\u5355\u5904\u7406\u4e0d\u9700\u8981\u7528\u6b63\u5219\uff0c\u6b63\u5219\u662f\u7528\u6765\u8fdb\u884c\u590d\u6742\u5904\u7406\u7684\u3002
\u6bd4\u5982\u8bfb\u4e00\u884c\u5230s\uff0c\u7136\u540e
r,_,s=s.partition('\u6307\u5b9a\u5b57\u7b26\u4e32')
\u73b0\u5728\uff0cr\u662f\u4e0d\u8981\u7684\u90e8\u5206\uff0cs\u5c31\u662f\u6307\u5b9a\u5b57\u7b26\u4e32\u540e\u7684\u90e8\u5206\uff0c\u5982\u679c\u6709\u7ed3\u679c\u7684\u8bdd\uff0c_\u7684\u503c\u4e5f\u662f\u6307\u5b9a\u5b57\u7b26\u4e32\u3002
\u5b9a\u4f4d\u67d0\u4e2a\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u51fd\u6570find(sub[,start[,end]])\uff0c\u8fd4\u56de\u5339\u914dsub\u5b57\u7b26\u4e32\u7684\u7b2c\u4e00\u4e2a\u5bf9\u8c61\u7684\u8d77\u59cb\u7d22\u5f15\u4f4d\u7f6e\uff0c\u6216\u4f7f\u7528re\u6a21\u5757\u4e0b\u7684re.search(pattern, string)\u65b9\u6cd5\uff0c\u67e5\u627e\u7b2c\u4e00\u4e2a\u5339\u914d\u7684\u4f4d\u7f6e\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u5339\u914d\u5bf9\u8c61\uff08match object,\u91cc\u9762\u5305\u542b\u5339\u914d\u7684\u8d77\u59cb\u548c\u7ec8\u6b62\u4f4d\u7f6e\u4fe1\u606f\u7b49\uff09\u3002\u81f3\u4e8e\u622a\u53d6\u7684\u64cd\u4f5c\uff0c\u6211\u5176\u5b9e\u4e0d\u662f\u5f88\u660e\u767d\uff0c\u6240\u4ee5\u7ed9\u51fa\u7684\u56de\u7b54\uff0c\u4ec5\u4f9b\u53c2\u8003\uff1a
import recontent="\u6211\u6709\u4e00\u4e2a\u5c0f\u6bdb\u9a74 \u53ef\u6211\u4ece\u6765\u4e5f\u4e0d\u9a91 \u6709\u4e00\u5929\u6211\u9a91\u7740\u5b83 \u4e0a\u8857\u533a\u8d76\u96c6 \n\\u6211\u60f3\u5403\u6709\u4e00\u5934\u5927\u8c61 \u53ef\u6211\u4ece\u6765\u4e5f\u4e0d\u9a91 \u6709\u4e00\u5929\u6211\u9a91\u7740\u5b83 \u4e0a\u8857\u533a\u8d76\u96c6 \n\\u6211\u4e70\u4e86\u4e00\u5934\u5c0f\u91ce\u732a \u53ef\u6211\u4ece\u6765\u4e5f\u4e0d\u9a91 \u6709\u4e00\u5929\u6211\u9a91\u7740\u5b83 \u4e0a\u8857\u533a\u8d76\u96c6"def location_and_capture(search_str,full_content):location=re.search(search_str,full_content)#\u8fd4\u56de\u4e00\u4e2amatch objectspan=location.span()#\u8fd4\u56de\u5339\u914d\u5bf9\u8c61\u8d77\u59cb\u4f4d\u7f6e\u7d22\u5f15\u548c\u7ed3\u675f\u4f4d\u7f6e\u7d22\u5f15\u7ec4\u6210\u7684\u5143\u7ec4\uff0c\u5373\uff08start,end\uff09start,end=spancapture_content=content[start+2:end]print("\u4f4d\u7f6e\uff1a",'(',start,end,')',"\u622a\u53d6\u7684\u5185\u5bb9\uff1a",capture_content)donkey=location_and_capture('\u4e00\u4e2a\u5c0f\u6bdb\u9a74',content)elepphant=location_and_capture('\u4e00\u5934\u5927\u8c61',content)boar=location_and_capture('\u4e00\u5934\u5c0f\u91ce\u732a',content)'''\u8f93\u51fa\u7ed3\u679c\uff1a\u4f4d\u7f6e\uff1a ( 2 7 ) \u622a\u53d6\u7684\u5185\u5bb9\uff1a \u5c0f\u6bdb\u9a74\u4f4d\u7f6e\uff1a ( 42 46 ) \u622a\u53d6\u7684\u5185\u5bb9\uff1a \u5927\u8c61\u4f4d\u7f6e\uff1a ( 80 85 ) \u622a\u53d6\u7684\u5185\u5bb9\uff1a \u5c0f\u91ce\u732a[Finished in 0.1s]'''
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左侧从0开始，右侧从-1开始
因为会涉及到执行效率的问题，所以需要根据情况灵活使用这两种索引方式截取字符串，比如：想快速获取最后一部分字符串，使用负索引是最快的。
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