Python编程基础与应用代码片段.zip

# -*- coding: utf-8 -*- """ 字典应用示例 词频统计 """ she_loves_you = ['she', 'loves', 'you', 'yeah', 'yeah', 'yeah', 'she', 'loves', 'you', 'yeah', 'yeah', 'yeah', 'she', 'loves', 'you', 'yeah', 'yeah', 'yeah', 'you', 'think', "you've", 'lost', 'your', 'love', 'well', 'i', 'saw', 'her', 'yesterday-yi-yay', "it's", 'you', "she's", 'thinking', 'of', 'and', 'she', 'told', 'me', 'what', 'to', 'say-yi-yay', 'she', 'says', 'she', 'loves', 'you', 'and', 'you', 'know', 'that', "can't", 'be', 'bad', 'yes', 'she', 'loves', 'you', 'and', 'you', 'know', 'you', 'should', 'be', 'glad', 'she', 'said', 'you', 'hurt', 'her', 'so', 'she', 'almost', 'lost', 'her', 'mind', 'and', 'now', 'she', 'says', 'she', 'knows', "you're", 'not', 'the', 'hurting', 'kind', 'she', 'says', 'she', 'loves', 'you', 'and', 'you', 'know', 'that', "can't", 'be', 'bad', 'yes', 'she', 'loves', 'you', 'and', 'you', 'know', 'you', 'should', 'be', 'glad', 'oo', 'she', 'loves', 'you', 'yeah', 'yeah', 'yeah', 'she', 'loves', 'you', 'yeah', 'yeah', 'yeah', 'with', 'a', 'love', 'like', 'that', 'you', 'know', 'you', 'should', 'be', 'glad', 'you', 'know', "it's", 'up', 'to', 'you', 'i', 'think', "it's", 'only', 'fair', 'pride', 'can', 'hurt', 'you', 'too', 'pologize', 'to', 'her', 'Because', 'she', 'loves', 'you', 'and', 'you', 'know', 'that', "can't", 'be', 'bad', 'Yes', 'she', 'loves', 'you', 'and', 'you', 'know', 'you', 'should', 'be', 'glad', 'oo', 'she', 'loves', 'you', 'yeah', 'yeah', 'yeah', 'she', 'loves', 'you', 'yeah', 'yeah', 'yeah', 'with', 'a', 'love', 'like', 'that', 'you', 'know', 'you', 'should', 'be', 'glad', 'with', 'a', 'love', 'like', 'that', 'you', 'know', 'you', 'should', 'be', 'glad', 'with', 'a', 'love', 'like', 'that', 'you', 'know', 'you', 'should', 'be', 'glad', 'yeah', 'yeah', 'yeah', 'yeah', 'yeah', 'yeah', 'yeah' ] def words_to_frequencies(words): word_dict = {} for word in words: if word in word_dict: word_dict[word] += 1 else: word_dict[word] = 1 return word_dict def most_common_words(word_dict): values = word_dict.values() best = max(word_dict.values()) words = [] for k in word_dict: if word_dict[k] == best: words.append(k) return (words, best) def words_often(word_dict, min_times): result = [] done = False while not done: temp = most_common_words(word_dict) if temp[1] >= min_times: result.append(temp) for w in temp[0]: del(word_dict[w]) else: done = True return result beatles = words_to_frequencies(she_loves_you) print(words_often(beatles, 5))