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實(shí)例說明Python中比較運(yùn)算符的使用

 更新時(shí)間：2015年05月13日 12:01:11   投稿：goldensun  
這篇文章主要介紹了=Python中比較運(yùn)算符的使用,是Python學(xué)習(xí)當(dāng)中的基本知識(shí),需要的朋友可以參考下

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

2015513120032469.jpg (585×480)

 例如：

試試下面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(dāng)執(zhí)行上面的程序它會(huì)產(chǎn)生以下結(jié)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


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