Python运算符允许我们对变量进行通用处理。
我们将通过示例和运算符优先级研究不同类型的python运算符。

Python运算符

Python运算符是可以操纵一个或者多个操作数的值的特殊符号。

Python运算符类型

Python运算符可分为几类。

• 算术运算符
• 逻辑运算符
• 比较运算符
• 按位运算符
• 赋值运算符

Python算术运算符

#create two variables
a=100
b=200

# addition (+) operator
print(a+b) 

# subtraction (-) operator
print(a-b) 

# multiplication (*) operator
print(a*b)

# division (/) operator
print(b/a)

# modulus (%) operator
print(a%b) # prints the remainder of a/b

# exponent (**) operator
print(a**b) #prints a^b

输出：

Python算术运算符

Python比较运算符

# create two variables
a=100
b=200

# (==) operator, checks if two operands are equal or not
print(a==b)

# (!=) operator, checks if two operands are not equal
print(a!=b)

# (>) operator, checks left operand is greater than right operand or not
print(a>b)

# (<) operator, checks left operand is less than right operand or not
print(a<b)
#(>=) operator, checks left operand is greater than or equal to right operand or not
print(a>=b)

# (<=) operator, checks left operand is less than or equal to right operand or not
print(a<=b)

Python比较运算符

Python按位运算符

#create two variables
a=10 # binary 1010
b=7  # binary 0111

# Binary AND (&) operator, done binary AND operation
print(a&b)

# Binary OR (|) operator, done binary OR operation
print(a|b)

# Binary XOR (^) operator, done binary XOR operation
print(a^b)

# Binary ONEs Compliment (~) operator, done binary One's Compliment operation
print(~a)

# Binary Left Shift (<<) operator, done binary Left Shift operation
print(a<<1) 
# Binary Right Shift (>>) operator, done binary Right Shift operation
print(a>>1)

Python逻辑运算符

#take user input as int
a=int(input())

# logical AND operation

if a%4==0 and a%3==0:
  print("divided by both 4 and 3")

# logical OR operation
if a%4==0 or a%3==0:
  print("either divided by 4 or 3")

# logical NOT operation
if not(a%4==0 or a%3==0):
  print("neither divided by 4 nor 3")

Python赋值运算符

# take two variable, assign values with assignment operators
a=3
b=4

print("a: "+str(a))
print("b: "+str(b))

# it is equivalent to a=a+b
a+=b

print("a: "+str(a))
print("b: "+str(b))

# it is equivalent to a=a*b
a*=b
print("a: "+str(a))
print("b: "+str(b))

# it is equivalent to a=a/b
a/=b
print("a: "+str(a))
print("b: "+str(b))

# it is equivalent to a=a%b
a%=b
print("a: "+str(a))
print("b: "+str(b))

# it is equivalent to a=a**b ( exponent operator)
a**=b
print("a: "+str(a))
print("b: "+str(b))

# it is equivalent to a=a//b ( floor division)
a//=b
print("a: "+str(a))
print("b: "+str(b))

Python运算符优先级

python运算符的优先级是指运算符的优先级。
当表达式中包含多个运算符时，这一点至关重要。
例如，考虑以下表达式：

>>> 2+3*4

现在，您认为这一系列操作是什么？我们可以将2和3相加，然后将结果乘以4。
此外，我们可以先将3和4相乘，然后再加上2。
其中我们可以看到运营商的优先级很重要。

以下是指示优先级的运算符列表。
按降序排列。
这意味着上层人群比下层人群具有更高的优先级。

• 括号–()
• 求幂–**
• 恭维，一元加减–"~"，" +"，"-"
• 乘，除，模–" *"，" /"，"％"
• 加减法-+，-
• 左右移位–>>， <<
• 按位AND –&
• 按位OR和XOR –|，^
• 比较运算符–==，！=，>， <，> =， <=
• 赋值运算符-=