An in-depth understanding of Python operators: a practical guide to bitwise operators, logical operators, and operator precedence

Application of Advanced Python Operators: Practical Guide to Shift Operators, Logical Operators, and Operator Priority

Python is a language widely used in various fields It is a high-level programming language, and it is very important to master the use of operators. In addition to basic arithmetic operators, Python also provides many other types of operators, including bitwise operators, logical operators, etc. This article will delve into the application of these operators and provide specific code examples to help readers better understand and use them.

1. Bit shift operator

The bit shift operator is an operator that performs shift operations on binary numbers. Python provides three bit shift operators: left shift (>) and circular right shift (

1. Left shift (

   Code Example:

   num = 10   # 二进制表示为 1010
   result = num << 2   # 左移2位，结果为 101000
   print(result)   # 输出：40

2. Shift right (>>): Shift the binary representation of a number to the right by the specified number of digits, and use the empty digits to 0 padding. Shifting right by n bits is equivalent to dividing the original number by 2 raised to the nth power.

   Code Example:

   num = 10   # 二进制表示为 1010
   result = num >> 2   # 右移2位，结果为 10
   print(result)   # 输出：2

3. Circular right shift (

   Code Example:

   num = 13   # 二进制表示为 1101
   result = num <<< 2   # 循环右移2位，结果为 0110
   print(result)   # 输出：6

2. Logical operators

Logical operators are operators used to compare and operate Boolean values. Python provides three logical operators: and (and), or (or) and not (not). The following are the specific definitions and applications of these three logical operators.

1. And (and): If both operands are true, the result is true; otherwise, the result is false.

   Code Example:

   a = True
   b = False
   result = a and b
   print(result)   # 输出：False

2. Or (or): If at least one operand is true, the result is true; otherwise, the result is false.

   Code Example:

   a = True
   b = False
   result = a or b
   print(result)   # 输出：True

3. Not (not): Invert the operand. If the operand is true, the result is false; if the operand is If false, the result is true.

   Code Example:

   a = True
   result = not a
   print(result)   # 输出：False

3. Practical Guide to Operator Priority

In Python, different operators have different priorities. . If an expression contains multiple operators at the same time, certain rules need to be followed to determine their execution order. Here are the general rules for operator precedence in Python:

1. Parentheses have the highest precedence and can be used to change the order in which operators are executed.
2. Multiplication, division and modulo operators have higher precedence than addition and subtraction operators.
3. Bitwise operators have lower precedence than arithmetic operators and comparison operators, but higher than logical operators.
4. Logical operators have the lowest precedence.

Code Example:

a = 10
b = 5
c = 2

result = (a + b) * c   # 先执行加法运算，再执行乘法运算
print(result)   # 输出：30

result = a + b * c   # 先执行乘法运算，再执行加法运算
print(result)   # 输出：20

result = a > b and b < c   # 先执行比较运算符，再执行逻辑运算符
print(result)   # 输出：False

Summary:

This article provides readers with advanced information by introducing the application of displacement operators, logical operators and operator priority. A guide to first-order Python operators. Mastering the application of these operators can help us better write complex programs and improve the efficiency and readability of the code. I hope this article will be helpful to your study and work!

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