fix syntax warning #2468

Makefile

@@ -81,13 +81,13 @@ install-sysdeps:
 
 install-pydeps-test:  ## Install python deps necessary to run unit tests.
 	${MAKE} install-pip
-	$(PYTHON) -m pip install $(PIP_INSTALL_ARGS) pip  # upgrade pip to latest version
+	$(PYTHON) -m pip install $(PIP_INSTALL_ARGS) pip setuptools
 	$(PYTHON) -m pip install $(PIP_INSTALL_ARGS) `$(PYTHON) -c "import setup; print(' '.join(setup.TEST_DEPS))"`
 
 install-pydeps-dev:  ## Install python deps meant for local development.
 	${MAKE} install-git-hooks
 	${MAKE} install-pip
-	$(PYTHON) -m pip install $(PIP_INSTALL_ARGS) pip  # upgrade pip to latest version
+	$(PYTHON) -m pip install $(PIP_INSTALL_ARGS) pip setuptools
 	$(PYTHON) -m pip install $(PIP_INSTALL_ARGS) `$(PYTHON) -c "import setup; print(' '.join(setup.TEST_DEPS + setup.DEV_DEPS))"`
 
 install-git-hooks:  ## Install GIT pre-commit hook.

psutil/tests/test_system.py

@@ -515,7 +515,6 @@ def _test_cpu_percent(self, percent, last_ret, new_ret):
         try:
             assert isinstance(percent, float)
             assert percent >= 0.0
-            assert percent is not -0.0
             assert percent <= 100.0 * psutil.cpu_count()
         except AssertionError as err:
             raise AssertionError(

scripts/internal/winmake.py

@@ -31,7 +31,6 @@
 PYTEST_ARGS = "-v -s --tb=short"
 HERE = os.path.abspath(os.path.dirname(__file__))
 ROOT_DIR = os.path.realpath(os.path.join(HERE, "..", ".."))
-PYPY = '__pypy__' in sys.builtin_module_names
 WINDOWS = os.name == "nt"