Add another tuple to a tuple of tuples

Question

I have the following tuple of tuples:

my_choices=(          ('1','first choice'),          ('2','second choice'),          ('3','third choice') ) 

and I want to add another tuple to the start of it

another_choice = ('0', 'zero choice') 

How can I do this?

the result would be:

final_choices=(              ('0', 'zero choice')              ('1','first choice'),              ('2','second choice'),              ('3','third choice')     ) 

Answer 1

Build another tuple-of-tuples out of another_choice, then concatenate:

final_choices = (another_choice,) + my_choices 

Alternately, consider making my_choices a list-of-tuples instead of a tuple-of-tuples by using square brackets instead of parenthesis:

my_choices=[      ('1','first choice'),      ('2','second choice'),      ('3','third choice') ] 

Then you could simply do:

my_choices.insert(0, another_choice) 

Answer 2

Don't convert to a list and back, it's needless overhead. + concatenates tuples.

>>> foo = ((1,),(2,),(3,)) >>> foo = ((0,),) + foo >>> foo ((0,), (1,), (2,), (3,))