下表列出了所有python语言支持的比较操作符。假设变量a持有10和变量b持有20，则：
例如：
试试下面的例子就明白了所有的python编程语言提供的比较操作符：
#!/usr/bin/pythona = 21b = 10c = 0if ( a == b ): print line 1 - a is equal to belse: print line 1 - a is not equal to bif ( a != b ): print line 2 - a is not equal to belse: print line 2 - a is equal to bif ( a b ): print line 3 - a is not equal to belse: print line 3 - a is equal to bif ( a b ): print line 5 - a is greater than belse: print line 5 - a is not greater than ba = 5;b = 20;if ( a = a ): print line 7 - b is either greater than or equal to belse: print line 7 - b is neither greater than nor equal to b
当执行上面的程序它会产生以下结果：
line 1 - a is not equal to bline 2 - a is not equal to bline 3 - a is not equal to bline 4 - a is not less than bline 5 - a is greater than bline 6 - a is either less than or equal to bline 7 - b is either greater than or equal to b