?下表列出了所有Python語言支持的標(biāo)識(shí)運(yùn)算符。
示例：
試試下面的例子就明白了所有Python編程語言提供的標(biāo)識(shí)運(yùn)算符：
#!/usr/bin/python
a = 20
b = 20
if ( a is b ):
print "Line 1 - a and b have same identity"
else:
print "Line 1 - a and b do not have same identity"
if ( id(a) == id(b) ):
print "Line 2 - a and b have same identity"
else:
print "Line 2 - a and b do not have same identity"
b = 30
if ( a is b ):
print "Line 3 - a and b have same identity"
else:
print "Line 3 - a and b do not have same identity"
if ( a is not b ):
print "Line 4 - a and b do not have same identity"
else:
print "Line 4 - a and b have same identity"
當(dāng)執(zhí)行上面的程序它會(huì)產(chǎn)生以下結(jié)果：
Line 1 - a and b have same identity
Line 2 - a and b have same identity
Line 3 - a and b do not have same identity
Line 4 - a and b do not have same identity
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