Can every vector space,V be written as direct sum decomposition of its proper subspaces which are T-invariant given T is a linear operator from V to V

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Since there are linear operators which have no eigen values, that's why this question rose in my mind as whether every vector space can be written as direct sum decomposition of T-invariant PROPER subspaces or are there any exceptions to it ?

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If $T$ is a non-trivial rotation of $\mathbb{R}^2$, there is no $T-$invariant proper subspace.