need to not return None

src/pytqshacl/__init__.py

@@ -1,4 +1,4 @@
-__version__ = "129"
+__version__ = "130"
 from .topquadrant import ver as tq_ver
 topquadrant_version = tq_ver
 from .run import validate, infer

src/pytqshacl/topquadrant/install.py

@@ -11,28 +11,28 @@ def get_existing_java():
     @classmethod
     def get(cls, *, prefer_existing=prefer_sysjava, **kw):
         if prefer_existing:
-            ej = cls.get_existing_java()
-            if ej: return ej
-        else:
-            return cls(**kw).bin
+            _ = cls.get_existing_java()
+            if _: return _
+        return cls(**kw).bin
 
     class defaults:
         ver = '21'
         jre = True
     def __init__(self, ver: str=defaults.ver, jre: bool=defaults.jre):
         self.ver = ver
         self.jre = jre
-        self.install(ver, jre)
+        self.install()
 
-    def install(self, ver: str, jre: bool):
+    def install(self,):
         if not self.dir:
             try:
                 import jdk
             except ModuleNotFoundError:
                 raise ModuleNotFoundError("can't install java. did you intend to install the feature pytqshacl[java]?")
             print('installing java to')
-            jdk.install(ver, jre=jre)
+            _ = jdk.install(self.ver, jre=self.jre)
             print(str(self.bin))
+            return _
 
 
     @property