diff --git a/example_scilog.py b/example_scilog.py
index 74f093b..d50708a 100755
--- a/example_scilog.py
+++ b/example_scilog.py
@@ -2,11 +2,13 @@
 
 import argparse
 
-parser = argparse.ArgumentParser()
+parser = argparse.ArgumentParser(formatter_class=argparse.ArgumentDefaultsHelpFormatter)
 parser.add_argument("pgroup", help="Expected form: p12345")
+parser.add_argument("-u", "--url", default="https://lnode2.psi.ch/api/v1", help="Server address")
 
 clargs = parser.parse_args()
 pgroup = clargs.pgroup
+url = clargs.url
 
 
 import urllib3
@@ -20,11 +22,10 @@ from scilog import Basesnippet, Paragraph
 tmp = Basesnippet()
 tmp.id = "2"
 
-# url = "https://lnode2.psi.ch/api/v1"
-url = "http://[::1]:3000/"
 log = SciLog(url)
 #print(log.token)
 logbooks = log.get_logbooks(ownerGroup=pgroup)
+print(logbooks)
 
 assert len(logbooks) == 1
 logbook = logbooks[0]
diff --git a/scilog/snippet.py b/scilog/snippet.py
index 906b4b6..bbfab50 100644
--- a/scilog/snippet.py
+++ b/scilog/snippet.py
@@ -34,10 +34,10 @@ def property_maker(name, dtype):
 
 class Snippet:
 
-    def __init__(self, snippetType="snippet", **kwargs):
+    def __init__(self, snippetType="snippet"):
         self._properties = []
+        self.set_properties(snippetType=str)
         self.snippetType = snippetType
-        self.set_properties(**kwargs)
 
     def set_properties(self, **kwargs):
         for name, dtype in kwargs.items():
@@ -53,7 +53,8 @@ class Snippet:
             return {key: getattr(self, key) for key in self._properties if getattr(self, key) is not None}
 
     def import_dict(self, properties):
-        self.__dict__.update(properties)
+        for name, value in properties.items():
+            setattr(self, name, value)
 
     @classmethod
     def from_dict(cls, properties):
@@ -75,13 +76,13 @@ class Snippet:
 
 class Basesnippet(Snippet):
 
-    def __init__(self):
-        props = dict(
+    def __init__(self, snippetType="basesnippet"):
+        super().__init__(snippetType=snippetType)
+        self.set_properties(
             id=str,
             parentId=str,
             ownerGroup=str,
             accessGroups=list,
-            snippetType=str,
             isPrivate=bool,
             createdAt=str,
             createdBy=str,
@@ -97,18 +98,17 @@ class Basesnippet(Snippet):
             versionable=bool,
             deleted=bool
         )
-        super().__init__(snippetType="basesnippet", **props)
 
 
 
 class Paragraph(Basesnippet):
 
-    def __init__(self):
-        props = dict(
+    def __init__(self, snippetType="paragraph"):
+        super().__init__(snippetType=snippetType)
+        self.set_properties(
             textcontent=str,
             isMessage=str
         )
-        super().__init__(snippetType="paragraph", **props)