Caching with functools32 broken
File "flatisfy/filters/__init__.py", line 113, in first_pass
flats_list = metadata.guess_postal_code(flats_list, constraint, config)
File "flatisfy/filters/metadata.py", line 139, in guess_postal_code
"postal_codes": data.load_data(PostalCode, constraint, config)
File "/usr/lib/python2.7/site-packages/functools32/functools32.py", line 394, in wrapper
result = cache[key]
TypeError: unhashable type: 'dict'