tests: skip py27 notebook

tox.ini

@@ -14,8 +14,8 @@ deps=
     pytest-cov
     pytest-timeout
     py{37,38,39}: pytest-asyncio
-    ipywidgets
-    nbval
+    !py{27,py2}: ipywidgets
+    !py{27,py2}: nbval
     coverage
     coveralls
     codecov
@@ -37,14 +37,14 @@ deps=
     py{36,37,38,39}: rich
     tf: tensorflow
 commands=
-    pytest --cov=tqdm --cov-report= tests_notebook.ipynb --nbval --current-env -W=ignore --sanitize-with=setup.cfg
+    !py{27,py2}: pytest --cov=tqdm --cov-report= tests_notebook.ipynb --nbval --current-env -W=ignore --sanitize-with=setup.cfg
     pytest --cov=tqdm --cov-report=xml --cov-report=term --cov-append -k "not perf"
     {[core]commands}
 allowlist_externals=codacy
 
 [testenv:py{27,py2}{,-tf}{,-keras}]
 commands=
-    pytest --cov=tqdm --cov-report= tests_notebook.ipynb -o addopts= -v --tb=short -rxs -W=ignore --durations=10 --nbval --current-env --sanitize-with=setup.cfg
+    !py{27,py2}: pytest --cov=tqdm --cov-report= tests_notebook.ipynb -o addopts= -v --tb=short -rxs -W=ignore --durations=10 --nbval --current-env --sanitize-with=setup.cfg
     pytest --cov=tqdm --cov-report=xml --cov-report=term --cov-append -k "not perf" -o addopts= -v --tb=short -rxs -W=error --durations=10
     {[core]commands}