Update plot_svm_regression.py

library imports have been moved to top of the file.
MAINT warn of future behaviour change proposed in #2610
Fix ValueError: Buffer dtype mismatch, expected 'INTP' but got 'long' on win-amd64
Merge pull request #3017 from cgohlke/patch-2

Fix ValueError: Buffer dtype mismatch, expected 'INTP' but got 'long' on win-amd64
FIX MSVC compile error C2036: 'void *' : unknown size

We were inadvertently using a GCC extension (pointer arithmetic on
void *). Fixes #2963, #3016.
TST: Fix ValueError: Buffer dtype mismatch, expected 'npy_intp' but got 'long' on win-amd64
TST don't run fast_dot tests on numpy>=1.7.2 + pep8
TST/COSMIT tests/comments for [sparse]center_data

Also removes sparse_std which was redundant
DOC: tfidf is actually tf*(idf+1) = tf + tf*idf
COSMIT: More readable drop for good test
FIX: checked in bad assertion in the last commit by mistake
Remove redundant yet unstable test_spectral_lobpcg_mode

The lobpcg mode is already tested in the test_spectral_clustering test.

LinAlgError was raised when executing test_spectral_lobpcg_mode on some
systems depending on the version of the scipy and LAPACK libraries.
TST: more robust test of dropping in Lars
TST: relax warning class checked in lars
TST: lars tests: more brutal ill-conditionning
ENH: make CD Lasso raise ConvergenceWarning
Merge pull request #3030 from ogrisel/fix-lars-drop-for-good-test-failure

Fix LARS drop for good test failure
DOC: clear up the big elastic net confusion (I hope)

Several users have asked for LogReg w/ E-net (e.g. #3023). Did some
additional copyediting.
Merge pull request #3025 from ogrisel/remove-unstable-lobpcg-test

[MRG] Remove redundant yet unstable test_spectral_lobpcg_mode
ENH: stable test + catch warning + pep8