Hello i have one issue with zeep on python i get the error

File "/var/task/zeep/xsd/types/complex.py", line 266, in render
    attr_value = value[name] if name in value else NotSet
TypeError: argument of type 'int' is not iterable

when i try to  assign value using record ref

journal_entry['currency'] = self.client.RecordRef(name="GBP")

any idea  how to solve it