rabi a9893be624 Fix find() interface when attr is not specified
It seems to use None as the attr key and throws TypeError.
Let's not do the secondary search when attr is not specified.

Change-Id: Ic240d19f48d362ab74a91bace5eab31542823718
Closes-Bug: #1739882
2018-01-06 14:37:29 +05:30
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