python3 basis of tuples

Python3  tuple

Python is similar to a list of tuples, except that the elements of the tuple can not be modified.

Tuples use parentheses, square brackets list.

Tuple create very simple, only you need to add elements in parentheses and separated by commas to

TUP1 = >>> ( 'the Google', 'Runoob', 1997, 2000); 
>>> tup2 = (. 1, 2,. 3,. 4,. 5); 
>>> tup3 = "A", "B", " c "," d "; # brackets need not be 
>>> type (tup3) 
<class 'tuple'>

Empty tuples

tup1 = ();

When tuple contains only one element, the element needs to be added after the comma, or brackets will be used as the operator:

TUP1 = >>> (50) 
>>> type (TUP1) # without comma, type Integer 
<class 'int'> 
 
>>> = TUP1 (50,) 
>>> type (TUP1) # comma type tuple 
<class 'tuple'>

Access tuple

Tuple subscripts may be used to access the index value tuples, the following examples:

#!/usr/bin/python3
 
tup1 = ('Google', 'Runoob', 1997, 2000)
tup2 = (1, 2, 3, 4, 5, 6, 7 )
 
print ("tup1[0]: ", tup1[0])
print ("tup2[1:5]: ", tup2[1:5])

Examples of the above output: 

TUP1 [0]: the Google 
tup2 [. 1:. 5]: (2,. 3,. 4,. 5)

Delete tuple

Element value tuples can not be deleted, but we can use the del statement to delete an entire tuple, the following examples:

tup = ( 'Google', ' Runoob', 1997, 2000) 
 
print (tup) 
del tup;

Operators tuple

Like the string, a tuple can be used between + and calculates asterisk. This means that they can be combined and after replication operation will generate a new tuple.

len ((1, 2, 3)) -> # 3 calculates the number of elements 
(1, 2, 3) + (4, 5, 6) -> (1, 2, 3, 4, 5, 6) # connection 
( 'Hi!',) * 4 -> ( 'Hi!', 'Hi!', 'Hi!', 'Hi!') # copy 
3 in (1, 2, 3 ) -> True # element exists 
for x in (1, 2, 3): print (x,) -> 1 2 3 # iterations

　

Tuple index, taken

Because a sequence of tuples is, we can access the element at the specified tuple, some elements may be taken in the index, a character string, a list of similar

Tuple built-in functions

Python tuple contains the following built-in functions

Count the number of tuples of elements. 
len (tuple) 
>>> tuple1 = ( 'the Google', 'Runoob', 'Taobao') 
>>> len (tuple1) 
. 3

Tuple element returns the maximum value 
max (tuple) 
	
>>> Tuple2 = ( '. 5', '. 4', '. 8') 
>>> max (Tuple2) 
'. 8'

　　

Returns the minimum element tuple.	
min (tuple) 
>>> Tuple2 = ( '. 5', '. 4', '. 8') 
>>> min (Tuple2) 
'. 4'

　　

Convert list is a tuple.	
tuple (SEQ) 
>>> List1 = [ 'the Google', 'Taobao', 'Runoob', 'Baidu'] 
>>> tuple1 = tuple (List1) 
>>> tuple1 
( 'the Google', 'Taobao', 'Runoob ',' Baidu ')