1 files changed, 4 insertions, 1 deletions
diff --git a/bs4/diagnose.py b/bs4/diagnose.py
index c04d23c..8768332 100644
--- a/bs4/diagnose.py
+++ b/bs4/diagnose.py
@@ -1,5 +1,7 @@
 """Diagnostic functions, mainly for use when doing tech support."""
 
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
 __license__ = "MIT"
 
 import cProfile
@@ -56,7 +58,8 @@ def diagnose(data):
         data = data.read()
     elif os.path.exists(data):
         print '"%s" looks like a filename. Reading data from the file.' % data
-        data = open(data).read()
+        with open(data) as fp:
+            data = fp.read()
     elif data.startswith("http:") or data.startswith("https:"):
         print '"%s" looks like a URL. Beautiful Soup is not an HTTP client.' % data
         print "You need to use some other library to get the document behind the URL, and feed that document to Beautiful Soup."