zj3D
8 months ago
parent
2518a5cd85
commit
950cb41e08
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from cppy.cp_util import *
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from collections import Counter
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from heapq import nlargest
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import re
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class Pipeline:
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def __init__(self):
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pass
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def __or__(self, other):
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class PipelineComposition(Pipeline):
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def __init__(self, first, second):
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self.first = first
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self.second = second
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def process(self, data):
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return self.second.process(self.first.process(data))
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return PipelineComposition(self, other)
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def process(self, data):
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raise NotImplementedError
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class FileReader(Pipeline):
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def __init__(self, filename):
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super().__init__()
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self.filename = filename
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def process(self):
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with open(self.filename, 'r', encoding='utf-8') as file:
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content = file.read()
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return content
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class WordFrequencyCounter(Pipeline):
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def process(self, text):
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words = re.findall(r'\w+', text.lower())
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word_freq = Counter(words)
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return word_freq
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class TopNFilter(Pipeline):
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def __init__(self, n):
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super().__init__()
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self.n = n
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def process(self, word_freq):
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return nlargest(self.n, word_freq.items(), key=lambda item: item[1])
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# 假设有一个文本文件"text.txt"，其内容是需要分析的文本
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filename = testfilepath
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n = 5 # 求取最高5个词频
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# 创建管道
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pipeline = FileReader(filename) | WordFrequencyCounter() | TopNFilter(n)
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# 执行管道
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top_n_words = pipeline.process()
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# 打印结果
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for word, freq in top_n_words:
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print(f"{word}: {freq}")
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from cppy.cp_util import *
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from collections import Counter
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class Pipe:
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def __init__(self, func, *args, kwargs=None):
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self.func = func
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# self.args, self.kwargs= None ,None
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if args : self.args = args
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if kwargs: self.kwargs = kwargs
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# print( self.args, self.kwargs)
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def __or__(self, other):
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return other(self._value)
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def __call__(self, data):
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self._value = self.func(data, *self.args, self.kwargs)
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def read_file(filename):
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with open(filename, 'r') as f:
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return f.read()
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def split_words(text):
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return re.findall(r'\b\w+\b', text.lower())
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def count_words(words):
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return Counter(words)
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def top_n_words(word_counts, n):
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return word_counts.most_common(n)
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# 使用管道
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pipe = Pipe(extract_file_words) | Pipe(get_frequencies) | Pipe(sort_dict) | Pipe(print_word_freqs, 5)
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result = pipe(testfilepath)
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print(result)
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@ -0,0 +1,49 @@
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import re
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from collections import Counter
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from functools import reduce
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from cppy.cp_util import *
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class Pipeline:
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def __init__(self, function):
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self.function = function
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def __or__(self, other):
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if isinstance(other, Pipeline):
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return Pipeline(lambda x: self.function(x) or other.function(x))
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else:
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raise TypeError("The argument must be an instance of Pipeline")
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def process(self, data):
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return self.function(data)
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# 定义处理函数
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def read_file(path):
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with open(path, 'r', encoding='utf-8') as file:
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return file.read()
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def clean_text(text):
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return re.sub(r'[^\w\s]', '', text).lower()
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def tokenize(text):
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return re.findall(r'\b\w+\b', text)
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def remove_stop_words(tokens, stop_words):
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return [token for token in tokens if token not in stop_words]
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def count_frequencies(tokens):
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return Counter(tokens)
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def get_top_n_frequencies(counter, n):
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return counter.most_common(n)
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# 定义停用词列表
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stop_words = set(['the', 'and', 'a', 'to', 'of', 'in', 'for', 'on', 'is', 'it', 'with', 'that', 'as', 'by', 'this', 'at', 'be', 'which', 'from', 'or', 'are', 'an', 'but', 'not', 'you', 'have', 'your', 'can', 'will', 'all', 'any', 'if', 'their', 'would', 'what', 'there', 'when', 'which', 'who', 'whom', 'whose', 'where', 'why'])
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# 创建管道
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pipeline = (Pipeline(read_file) | clean_text | tokenize
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| remove_stop_words | count_frequencies
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| get_top_n_frequencies(n=10))
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# 执行管道并打印结果
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top_n_word_frequencies = pipeline.process( testfilepath )
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print(top_n_word_frequencies)
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@ -1,45 +1,20 @@
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from cppy.cp_util import *
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###########################################
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#
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# 生成器
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###########################################
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def characters(filename): # 弹出一行
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for line in open(filename,encoding='utf-8'):
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for c in line:
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yield c
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def all_words(filename): # 弹出一个词
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start_char = True
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for c in characters(filename):
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if start_char == True:
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word = ""
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if c.isalnum(): # start of a word
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word = c.lower()
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start_char = False
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else:
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pass
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else:
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if c.isalnum():
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word += c.lower() # end of word, emit it
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else:
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start_char = True
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yield word
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def non_stop_words(filename, stopwords):
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for w in all_words(filename):
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if not w in stopwords:
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yield w # 弹出一个审核过的词
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if __name__ == "__main__":
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#
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def non_stop_words(testfilepath):
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stopwords = get_stopwords()
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data_str = read_file(testfilepath)
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wordlist = re_split( data_str )
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for word in wordlist:
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if word not in stopwords:
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yield word # 弹出一个非停用词
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freqs = {}
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for word in non_stop_words(testfilepath,stopwords):
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for word in non_stop_words(testfilepath):
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freqs[word] = freqs.get(word, 0) + 1
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data = sort_dict(freqs)
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print_word_freqs(data)
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