Python - 增强赋值运算符

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Python 增强赋值运算符将加法和赋值结合在一条语句中。由于Python支持混合算术，因此两个操作数可能是不同的类型。但是，如果左侧操作数更宽，则其类型会更改为右侧操作数。

Python - 增广加法运算符 (+=)

以下示例将有助于理解“+=”运算符的工作原理 -

a=10
b=5
print ("Augmented addition of int and int")
a+=b # equivalent to a=a+b
print ("a=",a, "type(a):", type(a))

a=10
b=5.5
print ("Augmented addition of int and float")
a+=b  # equivalent to a=a+b
print ("a=",a, "type(a):", type(a))

a=10.50
b=5+6j
print ("Augmented addition of float and complex")
a+=b #equivalent to a=a+b
print ("a=",a, "type(a):", type(a))

它将产生以下输出-

Augmented addition of int and int
a= 15 type(a): <class 'int'>
Augmented addition of int and float
a= 15.5 type(a): <class 'float'>
Augmented addition of float and complex
a= (15.5+6j) type(a): <class 'complex'>

Python - 增强减法运算符 (-=)

使用 -= 符号在单个语句中执行减法和赋值运算。“a-=b”语句执行“a=ab”赋值。操作数可以是任何数字类型。Python 对尺寸较小的对象执行隐式类型转换。

a=10
b=5
print ("Augmented subtraction of int and int")
a-=b #equivalent to a=a-b
print ("a=",a, "type(a):", type(a))

a=10
b=5.5
print ("Augmented subtraction of int and float")
a-=b #equivalent to a=a-b
print ("a=",a, "type(a):", type(a))

a=10.50
b=5+6j
print ("Augmented subtraction of float and complex")
a-=b #equivalent to a=a-b
print ("a=",a, "type(a):", type(a))

它将产生以下输出-

Augmented subtraction of int and int
a= 5 type(a): <class 'int'>
Augmented subtraction of int and float
a= 4.5 type(a): <class 'float'>
Augmented subtraction of float and complex
a= (5.5-6j) type(a): <class 'complex'>

Python - 增广乘法运算符 (*=)

“*=”运算符的工作原理类似。“a*=b”执行乘法和赋值运算，相当于“a=a*b”。如果是两个复数的增广乘法，则适用前一章中讨论的乘法规则。

a=10
b=5
print ("Augmented multiplication of int and int")
a*=b #equivalent to a=a*b
print ("a=",a, "type(a):", type(a))

a=10
b=5.5
print ("Augmented multiplication of int and float")
a*=b #equivalent to a=a*b
print ("a=",a, "type(a):", type(a))

a=6+4j
b=3+2j
print ("Augmented multiplication of complex and complex")
a*=b #equivalent to a=a*b
print ("a=",a, "type(a):", type(a))

它将产生以下输出-

Augmented multiplication of int and int
a= 50 type(a): <class 'int'>
Augmented multiplication of int and float
a= 55.0 type(a): <class 'float'>
Augmented multiplication of complex and complex
a= (10+24j) type(a): <class 'complex'>

Python - 增广除法运算符 (/=)

组合符号“/=”充当除法和赋值运算符，因此“a/=b”等价于“a=a/b”。int 或 float 操作数的除法运算为 float。两个复数相除返回一个复数。下面给出的是增广除法运算符的示例。

a=10
b=5
print ("Augmented division of int and int")
a/=b #equivalent to a=a/b
print ("a=",a, "type(a):", type(a))

a=10
b=5.5
print ("Augmented division of int and float")
a/=b #equivalent to a=a/b
print ("a=",a, "type(a):", type(a))

a=6+4j
b=3+2j
print ("Augmented division of complex and complex")
a/=b #equivalent to a=a/b
print ("a=",a, "type(a):", type(a))

它将产生以下输出-

Augmented division of int and int
a= 2.0 type(a): <class 'float'>
Augmented division of int and float
a= 1.8181818181818181 type(a): <class 'float'>
Augmented division of complex and complex
a= (2+0j) type(a): <class 'complex'>

Python - 增强模运算符 (%=)

要在单个语句中执行取模和赋值运算，请使用 %= 运算符。与 mod 运算符一样，其增强版本也不支持复数。

a=10
b=5
print ("Augmented modulus operator with int and int")
a%=b #equivalent to a=a%b
print ("a=",a, "type(a):", type(a))

a=10
b=5.5
print ("Augmented modulus operator with int and float")
a%=b #equivalent to a=a%b
print ("a=",a, "type(a):", type(a))

它将产生以下输出-

Augmented modulus operator with int and int
a= 0 type(a): <class 'int'>
Augmented modulus operator with int and float
a= 4.5 type(a): <class 'float'>

Python - 增广指数运算符 (**=)

“**=”运算符将“a”的计算结果提升为“b”，并将该值赋回“a”。下面给出一些例子 -

a=10
b=5
print ("Augmented exponent operator with int and int")
a**=b #equivalent to a=a**b
print ("a=",a, "type(a):", type(a))

a=10
b=5.5
print ("Augmented exponent operator with int and float")
a**=b #equivalent to a=a**b
print ("a=",a, "type(a):", type(a))

a=6+4j
b=3+2j
print ("Augmented exponent operator with complex and complex")
a**=b #equivalent to a=a**b
print ("a=",a, "type(a):", type(a))

它将产生以下输出-

Augmented exponent operator with int and int
a= 100000 type(a): <class 'int'>
Augmented exponent operator with int and float
a= 316227.7660168379 type(a): <class 'float'>
Augmented exponent operator with complex and complex
a= (97.52306038414744-62.22529992036203j) type(a): <class 'complex'>

Python - 增强地板除法运算符（//=）

要在单个语句中执行楼层划分和分配，请使用“//=”运算符。“a//=b”相当于“a=a//b”。该运算符不能与复数一起使用。

a=10
b=5
print ("Augmented floor division operator with int and int")
a//=b #equivalent to a=a//b
print ("a=",a, "type(a):", type(a))

a=10
b=5.5
print ("Augmented floor division operator with int and float")
a//=b #equivalent to a=a//b
print ("a=",a, "type(a):", type(a))

它将产生以下输出-

Augmented floor division operator with int and int
a= 2 type(a): <class 'int'>
Augmented floor division operator with int and float
a= 1.0 type(a): <class 'float'>