fix optional parameter error

Signed-off-by: Tushar Goel <tushar.goel.dav@gmail.com>

Author: TG1999

vulnerabilities/importer.py

@@ -122,7 +122,7 @@ class AffectedPackage:
     """
 
     package: PackageURL
-    affected_version_range: Optional[VersionRange]
+    affected_version_range: Optional[VersionRange] = None
     fixed_version: Optional[Version] = None
 
     def __post_init__(self):

vulnerabilities/importers/alpine_linux.py

@@ -29,7 +29,7 @@
 import requests
 from bs4 import BeautifulSoup
 from packageurl import PackageURL
-from univers.versions import AlpineLinuxVersion
+from univers.versions import AlpineLinuxsVersion
 
 from vulnerabilities.helpers import is_cve
 from vulnerabilities.importer import AdvisoryData
@@ -46,6 +46,7 @@ def advisory_data(self) -> Iterable[AdvisoryData]:
         advisory_links = fetch_advisory_links()
         for link in advisory_links:
             advisories.extend(process_link(link))
+        return advisories
 
 
 def fetch_advisory_links():
@@ -80,9 +81,6 @@ def process_link(link) -> List[AdvisoryData]:
         return advisories
 
     for package in record["packages"]:
-        assert isinstance(record.get("archs"), Iterable[str])
-        assert isinstance(record.get("reponame"), str)
-        assert isinstance(record.get("distroversion"), str)
         advisories.extend(
             load_advisories(
                 package["pkg"],
@@ -101,11 +99,9 @@ def load_advisories(
     archs: Iterable[str],
 ) -> Iterable[AdvisoryData]:
 
-    if not (pkg_infos.get("name") and isinstance(pkg_infos["name"], str)):
+    if not pkg_infos.get("name"):
         return []
 
-    assert isinstance(pkg_infos["secfixes"], Mapping[str, List])
-
     for version, fixed_vulns in pkg_infos["secfixes"].items():
 
         if fixed_vulns is None: