phone number, to letters conversion

[Gribouillis]

Tip: when variable names contain a varying index such as in

tuple0=("","","")
tuple1=("","","")
tuple2=("a","b","c")
tuple3=("d","e","f")
tuple4=("g","h","i")
tuple5=("j","k","l")
tuple6=("m","n","o")
tuple7=("p","q","r","s")
tuple8=("t","u","v")
tuple9=("w","x","y","z")

use a single list variable instead

atuple = [
    ("","",""),
    ("","",""),
    ("a","b","c"),
    ("d","e","f"),
    ("g","h","i"),
    ("j","k","l"),
    ("m","n","o"),
    ("p","q","r","s"),
    ("t","u","v"),
    ("w","x","y","z")]

Then instead of tuple7, use atuple[7]. It allows loops or simplifications such as

list_tuple.append(atuple[int(number)])

Similarly, instead of the variables a, b, c, d, e, f, g, you could use a list to contain them all. Finally, have a look at itertools.product()!