Merge pull request #320 from Jock2018/master
Update p03_keep_last_n_items.rst
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@@ -11,7 +11,8 @@
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解决方案
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----------
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保留有限历史记录正是 ``collections.deque`` 大显身手的时候。比如,下面的代码在多行上面做简单的文本匹配,
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并返回匹配所在行的最后N行:
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并返回匹配所在行及其前面的N行:
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.. code-block:: python
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