how to add value to a tuple?

python tuples
Shahzad picture Shahzad · Feb 6, 2011 · Viewed 197.3k times · Source

I'm working on a script where I have a list of tuples like ('1','2','3','4'). e.g.:

list = [('1','2','3','4'),
        ('2','3','4','5'),
        ('3','4','5','6'),
        ('4','5','6','7')]

Now I need to add '1234', '2345','3456' and '4567' respectively at the end of each tuple. e.g:

list = [('1','2','3','4','1234'),
        ('2','3','4','5','2345'),
        ('3','4','5','6','3456'),
        ('4','5','6','7','4567')]

Is it possible in any way?

Answer

AndiDog picture AndiDog · Feb 6, 2011

Tuples are immutable and not supposed to be changed - that is what the list type is for. You could replace each tuple by originalTuple + (newElement,), thus creating a new tuple. For example:

t = (1,2,3)
t = t + (1,)
print t
(1,2,3,1)

But I'd rather suggest to go with lists from the beginning, because they are faster for inserting items.

And another hint: Do not overwrite the built-in name list in your program, rather call the variable l or some other name. If you overwrite the built-in name, you can't use it anymore in the current scope.

Related questions

Convert list to tuple in Python

I'm trying to convert a list to a tuple. Most solutions on Google offer the following code: l = [4,5,6] tuple(l) However, the code results in an error message when I run it: TypeError: 'tuple' object is not callable How can …

Read More
How to sort a list/tuple of lists/tuples by the element at a given index?

I have some data either in a list of lists or a list of tuples, like this: data = [[1,2,3], [4,5,6], [7,8,9]] data = [(1,2,3), (4,5,6), (7,8,9)] And I want to sort by the 2nd element in the subset. Meaning, sorting by 2,5,8 where 2 is from (1,2,3), 5 is from (4,5,6). What …

Read More
Convert tuple to list and back

I'm currently working on a map editor for a game in pygame, using tile maps. The level is built up out of blocks in the following structure (though much larger): level1 = ( (1,1,1,1,1,1) (1,0,0,0,0,1) (1,0,0,0,0,1) (1,0,0,0,0,1) (1,0,0,0,0,1) (1,1,1,1,1,1)) where "1" is a block that's a wall and "0" is …

Read More