1. basic

Tuples is a sequence of immutable object. It's a sequence, just like List. However, it cannot be changed.

a = (1,2,3)

If a tuples only contain a object, we still need to include a comma.

b = (1,)

 

2. accessing the value

b = (1,2,3,4,5)b[0] #b[0] == 1b[1:3] #b[1:3] == (2,3)

 

3. Update the tuples

We can not change any value in a tuple.

b = (1,2)b[0] = 3 #this is wrong#What we can do it's justa = (3,4)c = a+b#result (3,4,1,2)

　　

4. delete a tuples

Since wen can not change a value in a tuple. What we can do is to delete a whole tuples.

b = (1,2)del b

　　

5. Basic operation

b = (1,2)len(b) #return the length of b(1)*4 #(1,1,1,1)1 in b #return Turefor i in b:	print(i)

　　

6. Built-in function

cmp(tuples1, tuples2) #compare two tupleslen(tuples)max(tuples1)min(tuples1)tuple(seq) #turn a seq into a tuple