WATCHDOG-5: Fix the use of the deprecated imp module

setup.py

@@ -18,7 +18,7 @@
 # limitations under the License.
 
 import sys
-import imp
+import importlib.util
 import os.path
 from setuptools import setup, find_packages
 from setuptools.extension import Extension
@@ -29,7 +29,10 @@
 SRC_DIR = 'src'
 WATCHDOG_PKG_DIR = os.path.join(SRC_DIR, 'watchdog')
 
-version = imp.load_source('version', os.path.join(WATCHDOG_PKG_DIR, 'version.py'))
+spec = importlib.util.spec_from_file_location(
+    'version', os.path.join(WATCHDOG_PKG_DIR, 'version.py'))
+version = importlib.util.module_from_spec(spec)
+spec.loader.exec_module(version)
 
 ext_modules = []
 if get_platform().startswith('macosx'):

tools/bootstrap.py

@@ -67,7 +67,6 @@ def quote(c):
 # out any namespace packages from site-packages that might have been
 # loaded by .pth files.
 clean_path = sys.path[:]
-import site
 sys.path[:] = clean_path
 for k, v in list(sys.modules.items()):
     if k in ('setuptools', 'pkg_resources') or (
@@ -190,8 +189,8 @@ def normalize_to_url(option, opt_str, value, parser):
     ez['use_setuptools'](**setup_args)
     if 'pkg_resources' in sys.modules:
         if sys.version_info[0] >= 3:
-            import imp
-            reload_ = imp.reload
+            import importlib
+            reload_ = importlib.reload
         else:
             reload_ = reload