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Update p13_create_data_processing_pipelines.rst #261

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2 changes: 1 addition & 1 deletion source/c04/p13_create_data_processing_pipelines.rst
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Expand Up @@ -129,7 +129,7 @@

在调用 ``gen_concatenate()`` 函数的时候你可能会有些不太明白。
这个函数的目的是将输入序列拼接成一个很长的行序列。
``itertools.chain()`` 函数同样有类似的功能，但是它需要将所有可迭代对象最为参数传入。
``itertools.chain()`` 函数同样有类似的功能，但是它需要将所有可迭代对象作为参数传入。
在上面这个例子中，你可能会写类似这样的语句 ``lines = itertools.chain(*files)`` ，
这将导致 ``gen_opener()`` 生成器被提前全部消费掉。
但由于 ``gen_opener()`` 生成器每次生成一个打开过的文件，
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