use importlib_metadata for python 3.7

tests/unit/test_lower_bound_checker.py

@@ -13,7 +13,6 @@
 # limitations under the License.
 
 from contextlib import contextmanager
-import importlib.metadata
 from pathlib import Path
 import re
 import tempfile
@@ -22,6 +21,12 @@
 from click.testing import CliRunner
 import pytest
 
+try:
+    import importlib.metadata as importlib_metadata
+except:
+    # For Python 3.7 compatibility
+    import importlib_metadata
+
 from test_utils.lower_bound_checker import lower_bound_checker
 
 RUNNER = CliRunner()
@@ -38,7 +43,7 @@
 def skip_test_if_not_installed(package_name: str):
     """Skips the current test if given package is not installed"""
     try:
-        importlib.metadata.distribution(package_name)
+        importlib_metadata.distribution(package_name)
     except importlib.metadata.PackageNotFoundError:
         pytest.skip(f"Skipping test which requires {package_name} in `tests/unit/resources/` to be installed")