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 (
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
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
Circular right shift (<<<): circularly shift the binary representation of a number to the right by the specified number of digits, that is, the number The right end n bits are moved to the left end, and the remaining bits are moved to the right. If the number of digits is m, then cyclically shifting the number to the right by n bits is equivalent to periodically shifting the number to the right n times.
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.
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
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
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:
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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