Dear all,

I would like to have inplace version of transpose for matrices. For the echelon form we have methods mat.echelonize vs mat.echelon_form. However I do not see how to deal with transpose in the same way. I see three reasonable possibilities

1) add an option inplace=True/False. There is at least one such method in Sage: the relabel method for graphs. The behavior is as follows:

  if inplace=True: returns a new graph
  if inplace=False: modifies the graph inplace and does not return anything

One can do the same with .transpose for matrices. However, this would be the first time in matrix code.

2) Make a private inplace method mat._transpose_inplace()

3) Make a public inplace method mat.transpose_inplace()

Any preference between 1), 2), 3) or a suggestion for something else is welcome!

Vincent

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