Different if condition in delete and replace noise function

[souro]

Thank you for this repo, this really helped me. But I have one doubt add_noise.py, line number (43-46) you have applied all 3 noise functions, using output of one function as input in other (line) ... does it have to be like this? or I can simply use one noise function individually? I think it can be like this, (delete/replace + permutation optional) ... but want to reconfirm...