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1、算数运算符2、比较运算3、赋值运算4、逻辑运算5、成员运算

1、条件语句if…else…示例mood = "bad"if mood == "great": print("today is a woderful day")else: print("So terrible！！！")输出：So terrible！！！if … elif… else…示例color = "green"if color == "green": print("...

字符串方法测试# 测试用例a = 'i am Chinese,I like Chinese!'aa = 'it contains tab!'print(len(a))# 首字母大写，其它全部小写b = a.capitalize()print(a)# 字符串方法返回新字符串，不改变原字符串print(b)# 居中显示，第一个参数width，第二个参数fillcha...

列表和字典都有推导式，元组没有推导式。列表的推导式：[expression for item in iterable if condition]下面这个例子的方法写得很棒，记录一下除了列表，字典也有自己的推导式。最简单的例子就像：{ key_expression : value_expression for expression in iterable }类似于列表推导，字典推导也有if...

Given a 32-bit signed integer, reverse digits of an integer.Example 1:Input: 123Output: 321Example 2:Input: -123Output: -321Example 3:Input: 120Output: 21Note:Assume we are dealing with an ...

问题描述：Given an array of integers, return indices of the two numbers such that they add up to a specific target.You may assume that each input would have exactly one solution, and you may not use the ...