item_func usage - end tag mismatch #46

I'm trying to change a list of dicts to xml. In the xml I need the item name to be 'module' instead of the default 'item' so have been trying to use the new item_func argument to dicttoxml to achieve this. Example of my list:
[{"key1": "1", "key2": "2", "key3": "3"}, {"key1": "1", "key2": "2", "key3": "3"}]

The following code nearly works but the module/item tags are incorrect i.e. the resulting xml has opening 'module' tags but closing 'item' tags:

import dicttoxml
a = [{"key1": "1", "key2": "2", "key3": "3"}, {"key1": "1", "key2": "2", "key3": "3"}]
f = lambda x: 'module'
output = dicttoxml.dicttoxml(a, attr_type=False, custom_root='xml', item_func=f)
print(output)
<?xml version="1.0" encoding="UTF-8" ?><xml><module><key3>3</key3><key2>2</key2><key1>1</key1></item><module><key3>3</key3><key2>2</key2><key1>1</key1></item></xml>

(May be easier to spot issue from xml output substring: <module><key3>3</key3><key2>2</key2><key1>1</key1></item> - see start 'module' tag & end 'item' tag)

Is this a bug in item_func? Or is my use case just not supported?

Thanks!