From 16d9bb92bb35b99fd268feb9fbae13dac1546d2b Mon Sep 17 00:00:00 2001
From: Viraj Kanwade <viraj.kanwade@forgeahead.io>
Date: Sun, 29 Nov 2020 19:00:16 -0800
Subject: [PATCH] configuration reader minor fixes to avoid runtime errors

---
 .gitignore               | 4 +++-
 appmap/_configuration.py | 4 ++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/.gitignore b/.gitignore
index 8b553c66..dc735b7f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,6 @@ __pycache__/
 *$py.class
 *.so
 
-.python-version
\ No newline at end of file
+.python-version
+
+.venv
diff --git a/appmap/_configuration.py b/appmap/_configuration.py
index 3dfb379a..4c1235f4 100644
--- a/appmap/_configuration.py
+++ b/appmap/_configuration.py
@@ -24,9 +24,9 @@ def __init__(self):
         for package in config['packages']:
             path = package['path']
             self._includes.add(path)
-            if package['exclude']:
+            if package.get('exclude'):
                 excludes = [f'{path}.{e}' for e in package['exclude']]
-                self._excludes.add(excludes)
+                self._excludes.update(excludes)
 
         print(f'self._includes {self._includes} self._excludes {self._excludes}')