["python","dictionary"]
Efficient way to remove keys with empty strings from a dict

I have a dict and would like to remove all the keys for which there are empty value strings. metadata = {u'Composite:PreviewImage': u'(Binary data 101973 bytes)', u'EXIF:CFAPattern2': u''} What is the best way to do this?
Python 2.X dict((k, v) for k, v in metadata.iteritems() if v) Python 2.7 - 3.X {k: v for k, v in metadata.items() if v} Note that all of your keys have values. It's just that some of those values are the empty string. There's no such thing as a key in a dict without a value; if it didn't have a value, it wouldn't be in the dict.