Ok, I know where I made mistake.
Just to clarify, and just wanna to be sure: the first toeplitz(n) is name of my function with n-variable, and Toeplitz(r,r) is like assigned function on which I can create my function and it comes from ToeplitzMatrices, isn’t it ?
P.S. Sorry, probably there is a lot of stupid questions, but I just have some basics of Python, I don’t know R or Matlab and Julia is also like s-f for me 