Kim van der Riet created PROTON-1758:

             Summary: [Python binding] Check message application property keys, 
convert binary to string
                 Key: PROTON-1758
             Project: Qpid Proton
          Issue Type: Bug
          Components: python-binding
            Reporter: Kim van der Riet
            Assignee: Kim van der Riet

The AMQP 1.0 specification requires message application property keys to be 
strings. Currently the Python binding makes no type check on message 
application property key types. Under Python 2, using the pattern
props['key'] = 'value'{noformat}
results in the key being encoded as binary, whereas in Python 3, it is a 
unicode string. While changing the pattern to
props[u'key'] = u'value'{noformat}
is trivially easy and would work for both versions of Python, it would help 
usability and AMQP wire correctness if the binding would check the key type and:
 # if binary, convert to unicode string;
 # if any other type, raise an exception

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