Do not try to encode filename if it is None,

which happens when instantiating an ImageMetadata from a buffer.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/pyexiv2/metadata.py b/src/pyexiv2/metadata.py
index 6dbe190..730e99f 100644
--- a/src/pyexiv2/metadata.py
+++ b/src/pyexiv2/metadata.py
@@ -55,7 +55,9 @@ class ImageMetadata(object):
         :param filename: path to an image file
         :type filename: string
         """
-        self.filename = filename.encode(sys.getfilesystemencoding())
+        self.filename = filename
+        if filename is not None:
+            self.filename = filename.encode(sys.getfilesystemencoding())
         self._image = None
         self._keys = {'exif': None, 'iptc': None, 'xmp': None}
         self._tags = {'exif': {}, 'iptc': {}, 'xmp': {}}