Create a separate section for unknown licenses

Signed-off-by: akugarg <akanksha.garg2k@gmail.com>

src/scancode/api.py

@@ -171,7 +171,7 @@ def get_licenses(location, min_score=0,
 
     detected_licenses = []
     detected_expressions = []
-
+    unknown_licenses=[]
     matches = idx.match(
         location=location, min_score=min_score, deadline=deadline, **kwargs)
 
@@ -181,15 +181,25 @@ def get_licenses(location, min_score=0,
         qspans.append(match.qspan)
 
         detected_expressions.append(match.rule.license_expression)
-
-        detected_licenses.extend(
-            _licenses_data_from_match(
+        if "unknown" in match.rule.license_expression:
+            unknown_licenses.extend(_licenses_data_from_match(
+                match=match,
+                include_text=include_text,
+                license_text_diagnostics=license_text_diagnostics,
+                license_url_template=license_url_template))
+        else:
+            detected_licenses.extend(
+                 _licenses_data_from_match(
                 match=match,
                 include_text=include_text,
                 license_text_diagnostics=license_text_diagnostics,
                 license_url_template=license_url_template)
-        )
-
+            )
+    if len(unknown_licenses) != 0:
+        result={}
+        result['Unknown_licenses'] = unknown_licenses
+        detected_licenses.append(result)
+
     percentage_of_license_text = 0
     if match:
         # we need at least one match to compute a license_coverage