If You try to receive message from Azure Service Bus message queue with Python and You encountered an error that says:
ValueError: could not convert string to float: 'max-age=31536000'
then You need to update azure-servicebus Python module to version 0.20.2 or greater.
pip install azure-servicebus==0.20.2
There is a breaking change in the ServiceBus Rest API that unfortunately forces people to move to 0.20.2. The 0.20.1 version is no longer working. Sorry about that :( - Laurent Mazuel, Microsoft