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from cppy.cp_util import *
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# 如果有连续的对数据加工操作，而且总是把共同加工数据对象当第一个参数，可以用一个管道框架来封装
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# 注意：最后还要调用一次对象call方法，才能执行最后一个函数
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class Pipe:
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def __init__(self, func, *args, **kwargs):
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self.func = func
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self.args = args
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self.kwargs = kwargs
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def __or__(self, other):
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data = self.func(*self.args, **self.kwargs)
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return Pipe( other.func,data,*other.args,**other.kwargs)
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def __call__(self):
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return self.func(*self.args, **self.kwargs)
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# 模仿管道
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pipe = Pipe(extract_file_words,testfilepath) | Pipe(get_frequencies) | Pipe(sort_dict) | Pipe(print_word_freqs, 10)
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pipe()
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