UUID('…') is not JSON serializable

Question

I get this error when i try to pass the UUID attribute to url parameter.

urlpatterns = [
    url(r\'^historia-clinica/(?P[W\\d\\-]+)/$\', ClinicH         


        

Answer 1

I had this same problem with a UUID field in a database model that I wanted to print out for debugging. I found that the pprint() function from the pprint module can handle this. You can also give it an indent argument to get the same kind of indented output that you would get from json.dumps()

https://docs.python.org/3/library/pprint.html#pprint.pprint

Example:

>>> import uuid
>>> import pprint
>>> import json
>>> x = uuid.UUID('12345678123456781234567812345678')
>>> x
UUID('12345678-1234-5678-1234-567812345678')
>>> print(x)
12345678-1234-5678-1234-567812345678
>>> json.dumps(x)
Traceback (most recent call last):
  File "", line 1, in 
...
...
    raise TypeError(repr(o) + " is not JSON serializable")
TypeError: UUID('12345678-1234-5678-1234-567812345678') is not JSON serializable
>>> pprint.pprint(x)
UUID('12345678-1234-5678-1234-567812345678')