fix: Update constant scripts to use importlib

Author: anth-volk

policyengine_api/constants.py

@@ -1,5 +1,5 @@
 from pathlib import Path
-import pkg_resources
+from importlib.metadata import distributions
 from datetime import datetime
 
 REPO = Path(__file__).parents[1]
@@ -18,11 +18,12 @@
     "policyengine_il",
 )
 try:
+    _dist_versions = {d.metadata["Name"]: d.version for d in distributions()}
     COUNTRY_PACKAGE_VERSIONS = {
-        country: pkg_resources.get_distribution(package_name).version
+        country: _dist_versions.get(package_name.replace("_", "-"), "0.0.0")
         for country, package_name in zip(COUNTRIES, COUNTRY_PACKAGE_NAMES)
     }
-except:
+except Exception:
     COUNTRY_PACKAGE_VERSIONS = {country: "0.0.0" for country in COUNTRIES}
 
 # Valid region types for each country

policyengine_api/country.py

@@ -11,7 +11,7 @@
     ParameterScaleBracket,
 )
 from policyengine_core.parameters import get_parameter
-import pkg_resources
+from importlib.metadata import version as get_package_version
 from policyengine_core.model_api import Reform, Enum
 from policyengine_core.periods import instant
 import dpath
@@ -60,9 +60,9 @@ def build_metadata(self):
             }[self.country_id],
             basicInputs=self.tax_benefit_system.basic_inputs,
             modelled_policies=self.tax_benefit_system.modelled_policies,
-            version=pkg_resources.get_distribution(
-                self.country_package_name
-            ).version,
+            version=get_package_version(
+                self.country_package_name.replace("_", "-")
+            ),
         )
 
     def build_microsimulation_options(self) -> dict: