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33 lines
1.2 KiB
33 lines
1.2 KiB
# 创建对象是消耗资源的，如果发现对象已经存在，可以返回引用，不创造新对象 。设计模式中这个做法叫享元
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from cppy.cp_util import *
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#享元类
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class WordFrequencyController():
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def __init__(self, controllertype,filepath ):
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word_list = extract_file_words(filepath)
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word_freq = get_frequencies(word_list)
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self.word_freq = sort_dict(word_freq)
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self.number = controllertype
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def print_word_freqs( self ):
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print_word_freqs( self.word_freq,self.number)
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#享元工厂
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class WordFrequencyControllerFactory():
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def __init__(self):
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self.types = {}
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def get_WordFrequencyController(self, number,testfilepath):
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if number not in self.types:
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self.types[number] = WordFrequencyController(number,testfilepath) # 创建新的对象
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print('new obj',number,'*'*30)
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else:
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print('ref obj','*'*30)
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return self.types[number] # 重复使用已存在的对象
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if __name__ == "__main__":
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factory = WordFrequencyControllerFactory()
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for number in [ 1,3,5,3,5,7 ]:
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WordFrequency = factory.get_WordFrequencyController(number,testfilepath)
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WordFrequency.print_word_freqs()
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