diff --git a/KorAPClient/__init__.py b/KorAPClient/__init__.py
index b74adab..9571401 100644
--- a/KorAPClient/__init__.py
+++ b/KorAPClient/__init__.py
@@ -1,4 +1,36 @@
-import rpy2.robjects.pandas2ri as pandas2ri
 import rpy2.robjects.packages as packages
+import rpy2.robjects.pandas2ri as pandas2ri
+from rpy2.robjects.methods import RS4
+
 KorAPClient = packages.importr('RKorAPClient')
 pandas2ri.activate()
+
+
+class KorAPConnection(RS4):
+    def __init__(self, *args, **kwargs):
+        kco = KorAPClient.KorAPConnection(*args, **kwargs)
+        super().__init__(kco)
+
+    def corpusStats(self, *args, **kwargs):
+        return KorAPClient.corpusStats(self, *args, **kwargs)
+
+    def frequencyQuery(self, *args, **kwargs):
+        return KorAPClient.frequencyQuery(self, *args, **kwargs)
+
+    def corpusQuery(self, *args, **kwargs):
+        return KorAPQuery(self, *args, **kwargs)
+
+
+class KorAPQuery(RS4):
+    def __init__(self, *args, **kwargs):
+        kco = KorAPClient.corpusQuery(*args, **kwargs)
+        super().__init__(kco)
+
+    def fetchNext(self, *args, **kwargs):
+        return KorAPClient.fetchNext(self, *args, **kwargs)
+
+    def fetchRest(self, *args, **kwargs):
+        return KorAPClient.fetchRest(self, *args, **kwargs)
+
+    def fetchAll(self, *args, **kwargs):
+        return KorAPClient.fetchAll(self, *args, **kwargs)
diff --git a/KorAPClient/tests/test_korapclient.py b/KorAPClient/tests/test_korapclient.py
index 2b0b7d6..34a52fa 100644
--- a/KorAPClient/tests/test_korapclient.py
+++ b/KorAPClient/tests/test_korapclient.py
@@ -1,17 +1,29 @@
 import unittest
-from KorAPClient import KorAPClient
+from KorAPClient import KorAPConnection
+
 
 class TestKorAPClient(unittest.TestCase):
+    def setUp(self):
+        self.kcon = KorAPConnection(verbose=True)
+
     def test_query(self):
-        kcon = KorAPClient.KorAPConnection()
-        q = KorAPClient.KorAPQuery(kcon, "Test")
+        q = self.kcon.corpusQuery("Test")
         self.assertEqual(q.slots['class'], 'KorAPQuery')
 
     def test_frequency_query(self):
-        kcon = KorAPClient.KorAPConnection()
-        df = KorAPClient.frequencyQuery(kcon, "Ameisenplage")
+        df = self.kcon.frequencyQuery("Ameisenplage")
         self.assertGreater(df['totalResults'][0], 10)
         self.assertGreater(10000, df['totalResults'][0])
 
+    def test_corpus_stats(self):
+        df = self.kcon.corpusStats(**{"as.df": True})
+        self.assertGreater(df['tokens'][0], 10**10)
+
+    def test_corpus_stats_with_vc(self):
+        de_tokens = self.kcon.corpusStats(vc='pubPlaceKey="DE"', **{"as.df": True})['tokens'][0]
+        ch_tokens = self.kcon.corpusStats(vc='pubPlaceKey="CH"', **{"as.df": True})['tokens'][0]
+        self.assertGreater(de_tokens, ch_tokens)
+
+
 if __name__ == '__main__':
     unittest.main()
diff --git a/Readme.md b/Readme.md
index 01da70a..f2d6aae 100644
--- a/Readme.md
+++ b/Readme.md
@@ -43,21 +43,27 @@
 Currently, there is no dedicated documentation for the Python variant of the library. Please refer to the [Refernce Manual of RKorAPClient](https://cran.r-project.org/web/packages/RKorAPClient/RKorAPClient.pdf) for now. 
 For translating the R syntax to Python and vice versa, pleas refer to the [rpy2 Documentation](https://rpy2.github.io/doc/latest/html/index.html).
 
+Please note that some arguments in the original RKorAPClient functions use characters that are not allowed in Python keyword argument names.
+For these cases, you can however use Python's `**kwargs` syntax.
+For example, to get the result of `corpusStats` as a `pandas.DataFrame`, and print the size of the whole corpus in tokens, you can write:
+```
+print(kcon.corpusStats(**{"as.df": True})['tokens'])
+```
 
 ## Examples
 #### Frequencies over years and countries
 ```python
-from KorAPClient import KorAPClient
+from KorAPClient import KorAPClient, KorAPConnection
 import plotly.express as px
 
 QUERY = "Hello World"
 YEARS = range(2010, 2019)
 COUNTRIES = ["DE", "CH"]
 
-kcon = KorAPClient.KorAPConnection(verbose=True)
+kcon = KorAPConnection(verbose=True)
 
 vcs = ["textType=/Zeit.*/ & pubPlaceKey=" + c + " & pubDate in " + str(y) for c in COUNTRIES for y in YEARS]
-df = KorAPClient.ipm(KorAPClient.frequencyQuery(kcon, QUERY, vcs))
+df = KorAPClient.ipm(kcon.frequencyQuery(QUERY, vcs))
 df['Year'] = [y for c in COUNTRIES for y in YEARS]
 df['Country'] = [c for c in COUNTRIES for y in YEARS]
 
diff --git a/examples/hello_world.py b/examples/hello_world.py
index 126b3bf..6ac91cc 100755
--- a/examples/hello_world.py
+++ b/examples/hello_world.py
@@ -1,15 +1,17 @@
 #!/usr/bin/env python3
-from KorAPClient import KorAPClient
+from KorAPClient import KorAPClient, KorAPConnection
 import plotly.express as px
 
 QUERY = "Hello World"
 YEARS = range(2010, 2019)
 COUNTRIES = ["DE", "CH"]
 
-kcon = KorAPClient.KorAPConnection(verbose=True)
+kcon = KorAPConnection(verbose=True)
 
 vcs = ["textType=/Zeit.*/ & pubPlaceKey=" + c + " & pubDate in " + str(y) for c in COUNTRIES for y in YEARS]
-df = KorAPClient.ipm(KorAPClient.frequencyQuery(kcon, QUERY, vcs))
+df = KorAPClient.ipm(kcon.frequencyQuery(QUERY, vcs))
+print(df)
+
 df['Year'] = [y for c in COUNTRIES for y in YEARS]
 df['Country'] = [c for c in COUNTRIES for y in YEARS]
 
diff --git a/setup.py b/setup.py
index 2f7c9c1..53f5cb8 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
 
 setup(
     name="KorAPClient",
-    version="0.0.2",
+    version="0.1.0",
     author="Marc Kupietz",
     author_email="kupietz@ids-mannheim.de",
     description="Client package to access KorAP's web service API",