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【leetcode】1647. Minimum Deletions to Make Character Frequencies Unique
题目如下： A string s is called good if there are no two different characters in s that have the same frequency. Given a string s, return the minimum number of characters you need to delete to make s good. The frequency of a character in a strinPython代码阅读（第34篇）：列表元素出现频率字典
Python 代码阅读合集介绍：为什么不推荐Python初学者直接看项目源码 本篇阅读的代码实现了从一个列表生成以其元素为key，以该元素出现频率为value的字典。 本篇阅读的代码片段来自于30-seconds-of-python。 frequencies from functools import reduce def frequencies(lst): f =1647. Minimum Deletions to Make Character Frequencies Unique
A string s is called good if there are no two different characters in s that have the same frequency. Given a string s, return the minimum number of characters you need to delete to make s good. The frequency of a character in a string is the n完整的使用jieba分词后生成词云
导入需要的模块 import jieba jieba.setLogLevel(jieba.logging.INFO) # 设置日志等级，使底层日志不要打印出来 import jieba.analyse from wordcloud import WordCloud from wordcloud import ImageColorGenerator import matplotlib.pyplot as plt 使用jieba生成字符串：浮K核苷酸频率（KNF，k-nucleotide frequencies）或K-mer频率
K核苷酸频率（KNF，k-nucleotide frequencies）或K-mer频率 KNF描述了序列中存在k个核苷酸的所有可能的多核苷酸的频率。如果k=2，则计算的为双核苷酸频率（即AA、AT、AG、AC、……TT），共42=16种；如果k=3，则计算的为双核苷酸频率（即AAA、AAT、AAG、AAC、……TTT），共43=64种；以此类推。 K-me