fix edge case where pypi license: null causes a crash (#81)

Author: FredHappyface

licensecheck/packageinfo.py

@@ -86,7 +86,9 @@ def getPackageInfoPypi(requirement: ucstr) -> PackageInfo:
 			author=_pkgMetadataGet(info, "author"),
 			size=size,
 			license=ucstr(
-				licenseClassifier if licenseClassifier != UNKNOWN else info.get("license", UNKNOWN)
+				licenseClassifier
+				if licenseClassifier != UNKNOWN
+				else info.get("license", UNKNOWN) or UNKNOWN
 			),
 		)
 	except KeyError as error:

licensecheck/types.py

@@ -11,12 +11,14 @@ class ucstr(str):
 
 	__slots__ = ()
 
-	def __new__(cls, v: str) -> ucstr:
+	def __new__(cls, v: str|None) -> ucstr:
 		"""Create a new ucstr from a str.
 
 		:param str v: string to cast
 		:return ucstr: uppercase string.
 		"""
+		if v is None:
+			return ucstr("")
 		return super().__new__(cls, v.upper())