下表列出了所有Python語言支持的比較操作符。假設變量a持有10和變量b持有20，則：

運算符	描述	示例
==	檢查兩個操作數的值是否相等，如果是，則條件變為真。	(a == b) 不為 true.
!=	檢查兩個操作數的值是否等相等，如果值不相等，則條件變為真。	(a != b) 為 true.
<>	檢查兩個操作數的值是否等相等，如果值不相等，則條件變為真。	(a <> b) 結果為true。這類似於!=運算符。
>	檢查左操作數的值是否大於右操作數的值，如果是，則條件成立。	(a > b) 為  true.
<	檢查左操作數的值是否小於右操作數的值，如果是，則條件成立。	(a < b) 為true.
>=	檢查左操作數的值是否大於或等於右操作數的值，如果是，則條件成立。	(a >= b) 不為 true.
<=	檢查左操作數的值是否小於或等於右操作數的值，如果是，則條件成立。	(a <= b) 為 true.

例如：

試試下麵的例子就明白了所有的Python編程語言提供的比較操作符：

#!/usr/bin/python

a = 21
b = 10
c = 0

if ( a == b ):
   print "Line 1 - a is equal to b"
else:
   print "Line 1 - a is not equal to b"

if ( a != b ):
   print "Line 2 - a is not equal to b"
else:
   print "Line 2 - a is equal to b"

if ( a <> b ):
   print "Line 3 - a is not equal to b"
else:
   print "Line 3 - a is equal to b"

if ( a < b ):
   print "Line 4 - a is less than b" 
else:
   print "Line 4 - a is not less than b"

if ( a > b ):
   print "Line 5 - a is greater than b"
else:
   print "Line 5 - a is not greater than b"

a = 5;
b = 20;
if ( a <= b ):
   print "Line 6 - a is either less than or equal to  b"
else:
   print "Line 6 - a is neither less than nor equal to  b"

if ( b >= a ):
   print "Line 7 - b is either greater than  or equal to b"
else:
   print "Line 7 - b is neither greater than  nor equal to b"

當執行上麵的程序它會產生以下結果：

Line 1 - a is not equal to b
Line 2 - a is not equal to b
Line 3 - a is not equal to b
Line 4 - a is not less than b
Line 5 - a is greater than b
Line 6 - a is either less than or equal to b
Line 7 - b is either greater than or equal to b