Python13 The tuple (to bring the shackles list)

A, defined tuple

　　Tuple Once established, within tuple element can not be edited and deleted, which is a list of tuples and the biggest difference

 

　　When only one tuple element, after the element needs to be a comma, or may be no brackets.

1 tuple1 = (12,3234,54354,656,6)
2 tuple2 = (12,)
3 tuple3 = 12,
4 tuple2 == tuple3
5 True

View Code

Second, access tuple

　　Tuple name [index] tuple access the same forms and lists

　　NOTE: may be used for tuples splicing operator "+" repetition operator "*", logical operators, relational operators, and members of the operator, can be sliced ​​tuple, can be used del deleted tuples, but you can not delete an element

Third, you can employ special methods delete and modify tuple element (splice element group and the fragment generated tuple name to the name of the original tuple)

. 1 tuple1 = ( ' James ' , ' Davies ' , ' George ' , ' Westbrook ' )
 2 tuple1 tuple1 = [:. 1] + ( ' Lillard ' ,) + tuple1 [2 :]
 . 3  tuple1
 . 4 ( ' James ' , ' Lillard ' , ' George ' , ' Westbrook ' )

View Code

　　The original tuple still exists, but is not called tuple1, and soon it will be garbage collection mechanism