Not unless it's the loop is made out several function calls. For example: def even(x): return x == 0 ? True : odd(x - 1) def odd(x): r

Not unless it's the loop is made out several function calls. For example: def even(x): return x == 0 ? True : odd(x - 1) def odd(x): return x == 0 ? False : even(x - 1) print(even(17)) Properly implemented TCO means that the call to 'even(17)' should use only one stack frame.