Replacing last value in list of tuples

So, I have a tuple like this:

a=[(1, 2, 3), (4, 5, 6), (7, 8, 9)] 

and I want to replace last value of each tuple with 100. So I can do:

b=[(t[0],t[1],) + (100,) for t in a]

That gives me this:

[(1, 2, 100), (4, 5, 100), (7, 8, 100)].

What's the shortcut? These tuples, in real, have 50 elements in it?


Use tuple slicing:

[t[:-1] + (100,) for t in a]

There is no need to build a completely new tuple from individual elements here.

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