Add PYRO-NN to sys.path in test_pyronn_examples

tests/test_pyronn_examples.py

@@ -8,6 +8,7 @@
 
 """
 import importlib.util
+import sys
 from glob import glob
 from os.path import basename, dirname, join
 
@@ -16,11 +17,11 @@ def test_pyronn_examples():
     example_files_glob = join(dirname(__file__), 'PYRO-NN', 'examples', '**', '*.py')
     example_files = glob(example_files_glob, recursive=True)
 
+    sys.path.append(join(dirname(__file__), 'PYRO-NN'))
+
     for file in example_files:
         print(file)
         print(basename(file))
         spec = importlib.util.spec_from_file_location(basename(file), file)
         foo = importlib.util.module_from_spec(spec)
         spec.loader.exec_module(foo)
-
-