Python-bitwise-operators-example

Pythonビット演算子の例

Python言語でサポートされているビット演算子は次のとおりです。

Operator	Description	Example
& Binary AND	Operator copies a bit to the result if it exists in both operands	(a & b) (means 0000 1100)
	Binary OR	It copies a bit if it exists in either operand.
(a	b) = 61 (means 0011 1101)	^ Binary XOR
It copies the bit if it is set in one operand but not both.	(a ^ b) = 49 (means 0011 0001)	~ Binary Ones Complement
It is unary and has the effect of 'flipping' bits.	(~a ) = -61 (means 1100 0011 in 2’s complement form due to a signed binary number.	<< Binary Left Shift
The left operands value is moved left by the number of bits specified by the right operand.	a << 2 = 240 (means 1111 0000)	>> Binary Right Shift

例

#!/usr/bin/python

a = 60            # 60 = 0011 1100
b = 13            # 13 = 0000 1101
c = 0

c = a & b;        # 12 = 0000 1100
print "Line 1 - Value of c is ", c

c = a | b;        # 61 = 0011 1101
print "Line 2 - Value of c is ", c

c = a ^ b;        # 49 = 0011 0001
print "Line 3 - Value of c is ", c

c = ~a;           # -61 = 1100 0011
print "Line 4 - Value of c is ", c

c = a << 2;       # 240 = 1111 0000
print "Line 5 - Value of c is ", c

c = a >> 2;       # 15 = 0000 1111
print "Line 6 - Value of c is ", c

上記のプログラムを実行すると、次の結果が生成されます-

Line 1 - Value of c is 12
Line 2 - Value of c is 61
Line 3 - Value of c is 49
Line 4 - Value of c is -61
Line 5 - Value of c is 240
Line 6 - Value of c is 15