Python常用运算符大盘点：掌握这些技巧让你编程更高效 =============== 序言 ---- Python作为一门广泛应用的编程语言，其简洁、易读、易学的特点吸引了大量程序员。Python提供了许多内置的运算符，通过它们可以完成各种各样的数据处理和计算任务。熟练掌握这些运算符，可以让你在编程过程中更加得心应手，提高工作效率。本文将对Python中常用的运算符进行盘点，并介绍如何运用它们提高编程效率。 一、数学运算符 -------------- ### 加法运算符 ```python a = 10 b = 20 print(a + b) # 20 ``` ### 减法运算符 ```python a = 10 b = 20 print(a - b) # 10 ``` ### 乘法运算符 ```python a = 10 b = 3 print(a * b) # 30 ``` ### 除法运算符 ```python a = 10 b = 5 print(a / b) # 2 ``` ### 取模运算符 ```python a = 10 b = 5 print(a % b) # 0 ``` ### 指数运算符 ```python a = 2 print(a ** 2) # 4 ``` ### 布尔运算符 ```python a = True b = False print(a & b) # True print(a | b) # True print(a ^ b) # False print(a > b) # True print(a < b) # False print(a == b) # False print(a!= b) # True ``` ### 连接运算符 ```python a = [1, 2, 3] b = [4, 5, 6] print('a' + 'b') # [1, 2, 3, 4, 5, 6] ``` ### 成员引用运算符 ```python class Person: def __init__(self, name, age): self.name = name self.age = age print(Person('Alice', 30)) # Alice ``` ### 格式化字符串运算符 ```python a = "Hello, %s" % "World" print(a) # Hello, World ``` ### 切片运算符 ```python a = [1, 2, 3, 4, 5, 6] b = [7, 8, 9, 10] print(a[1:3]) # [2, 3, 4] ``` ### 反身代词运算符 ```python a = "Hello, " print(a[-1]) # Hello ``` 二、字符串运算符 -------------- ### 拼接字符串 ```python a = "Hello, " b = "World" print(a + b) # Hello, World ``` ### 截取字符串 ```python a = "Hello, " print(a[:-1]) # Hello ``` ### 替换字符串中的字符 ```python a = "Hello, " b = "Friend" a = a.replace(b, "Friend") print(a) # Hello, Friend ``` ### 检查字符串是否为空 ```python a = "" print(a is None) # True ``` ### 字符串比较运算符 ```python a = "Hello, " b = "World" print(a == b) # False print(a!= b) # True ``` ### 字符串的修饰运算符 ```python a = "Hello, " b = "Friend" print(a[0:5] # Hello, ```