Convert a python list to a Vector

Question

I would like to convert a python list to a Vector (a matrix with a single column). Example: [1, 2, 3] should become [[1], [2], [3]].

Answer 1

Use list comprehension:

>>> [[i] for i in [1,2,3]]
[[1], [2], [3]]

or you can also use map and lambda:

>>> map(lambda x: [x], [1, 2, 3])
[[1], [2], [3]]