#!/usr/bin/python
# -*- coding: UTF-8 -*-

tuple = ( 'abcd', 786 , 2.23, 'john', 70.2 )
tinytuple = (123, 'john')

print tuple # 輸出完整元組
print tuple[0] # 輸出元組的第一個(gè)元素
print tuple[1:3] # 輸出第二個(gè)至第三個(gè)的元素 
print tuple[2:] # 輸出從第三個(gè)開始至列表末尾的所有元素
print tinytuple * 2 # 輸出元組兩次
print tuple + tinytuple # 打印組合的元組

以上實(shí)例輸出結(jié)果：

('abcd', 786, 2.23, 'john', 70.2)
abcd
(786, 2.23)
(2.23, 'john', 70.2)
(123, 'john', 123, 'john')
('abcd', 786, 2.23, 'john', 70.2, 123, 'john')

以下是元組無效的，因?yàn)樵M是不允許更新的。而列表是允許更新的：

#!/usr/bin/python
# -*- coding: UTF-8 -*-

tuple = ( 'abcd', 786 , 2.23, 'john', 70.2 )
list = [ 'abcd', 786 , 2.23, 'john', 70.2 ]
tuple[2] = 1000 # 元組中是非法應(yīng)用
list[2] = 1000 # 列表中是合法應(yīng)用

Python邏輯運(yùn)算符
Python語言支持邏輯運(yùn)算符，以下假設(shè)變量a為10，變量b為20：

以下實(shí)例演示了Python所有邏輯運(yùn)算符的操作：

#!/usr/bin/python

a = 10
b = 20
c = 0

if ( a and b ):
  print "Line 1 - a and b are true"
else:
  print "Line 1 - Either a is not true or b is not true"

if ( a or b ):
  print "Line 2 - Either a is true or b is true or both are true"
else:
  print "Line 2 - Neither a is true nor b is true"


a = 0
if ( a and b ):
  print "Line 3 - a and b are true"
else:
  print "Line 3 - Either a is not true or b is not true"

if ( a or b ):
  print "Line 4 - Either a is true or b is true or both are true"
else:
  print "Line 4 - Neither a is true nor b is true"

if not( a and b ):
  print "Line 5 - Either a is not true or b is not true or both are not true"
else:
  print "Line 5 - a and b are true"

以上實(shí)例輸出結(jié)果：

Line 1 - a and b are true
Line 2 - Either a is true or b is true or both are true
Line 3 - Either a is not true or b is not true
Line 4 - Either a is true or b is true or both are true
Line 5 - Either a is not true or b is not true or both are not true

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