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import json |
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import time |
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import sys |
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if __name__ == '__main__': |
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print('grouping duplicate urls ...') |
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input = sys.argv[1] |
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output = sys.argv[2] |
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if len(sys.argv) > 3: |
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jaccard_similarity_threshold = float(sys.argv[3]) |
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else: |
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jaccard_similarity_threshold = 0.7 |
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url_to_index = {} |
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index_to_urls = [] |
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counter = 0 |
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start_time = time.time() |
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with open(input, 'r') as f: |
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for line in f: |
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counter += 1 |
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myjson = json.loads(line) |
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urls = [] |
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for main_url in myjson.keys(): |
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urls.append(main_url) |
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for value in myjson[main_url]: |
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for other_url, js in value.items(): |
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if js >= jaccard_similarity_threshold: |
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urls.append(other_url) |
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current_index = -1 |
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other_indices = set() |
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for url in urls: |
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if url in url_to_index: |
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if current_index == -1: |
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current_index = url_to_index[url] |
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elif current_index != url_to_index[url]: |
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other_indices.add(url_to_index[url]) |
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if current_index == -1: |
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current_index = len(index_to_urls) |
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index_to_urls.append(set()) |
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for url in urls: |
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url_to_index[url] = current_index |
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index_to_urls[current_index].add(url) |
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for index in other_indices: |
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for url in index_to_urls[index]: |
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index_to_urls[current_index].add(url) |
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url_to_index[url] = current_index |
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index_to_urls[index] = None |
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if counter % 100000 == 0: |
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print(' > processed {} lines in {} seconds ...'.format( |
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counter, time.time() - start_time)) |
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total_remove = 0 |
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total_remain = 0 |
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for urls in index_to_urls: |
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if urls is not None: |
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if len(urls) > 1: |
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total_remove += (len(urls) - 1) |
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total_remain += 1 |
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print('out of {} urls, only {} are unique and {} should be removed'.format( |
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total_remove+total_remain, total_remain, total_remove)) |
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with open(output, 'wb') as f: |
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for i, urls in enumerate(index_to_urls): |
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if urls is not None: |
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if len(urls) > 1: |
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myjson = json.dumps({str(i): list(urls)}, |
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ensure_ascii=False) |
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f.write(myjson.encode('utf-8')) |
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f.write('\n'.encode('utf-8')) |
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