Question

If I created a tuple with the line tup=() and now it's technically empty. How do I add a value (let's say the value of c) to the tuple ?

Answer 1

try
tup = tup + (c,)

Answer 2

Thanks !!!! I tried tup.append . what is append ?

Answer 3

? the readings (data structures) say it means to add to the end of a list. What i told you is about the extent of my tuple knowledge lol

Answer 4

ahh. anyway it worked, I guess I got confused between a tuple and a list ! :) aaaaaaaanyway thanks a lot

Answer 5

You cannot append to a tuple. tuples are immutable and cannot be changed. You can however construct a new tuple that contains elements from another tuple.

For example

t1 = (1,) # Create an empty tuple
t2 = (2,) # Create another tuple

t3 = t1 + t2 # Create a new tuple that has elements from t1 and t2
t3 = t3 + (3,) # Create a new tuple that has elements from t3 and another (literal) tuple
r1 = t3 # Make r1 refer to the same tuple t3 refers to
t3 = t3 + (4,) # Create a new tuple that has elements from t3 and another literal tuple
print t3
print r1
#r1 and t3 no longer reference the same tuple because we reassigned it.

l1 = [1] # Create a new list that has a 1 in it
l2 = [2] # Create a new list that has a 2 in it
l3 = l1 + l2 # Create a new list that has the elements from l1 and l2
l3.append(3) # Add 3 to the list referenced by l3
r2 = l3 # Make r2 reference the same list l3 does
l3.append(4) # Add a 4 to the list referenced by l3
print l3
print r2
#r2 and l3 refer to the same list so they display the same numbers
l3 = l3 + [5] # Create a new list containing items from l3 and a 5
print l3
print r2
# r2 and l3 no longer refer to the same lists.