Extremely basic example does not load

[felix-schneider]

The following example does not work for me:

import yaml

class Test(yaml.YAMLObject):
    yaml_tag = "!Test"

yaml.unsafe_load("!Test")

I am getting this error:

yaml.constructor.ConstructorError: could not determine a constructor for the tag '!Test'
  in "<unicode string>", line 1, column 1:
    !Test

I am using Python 3.7 and pyyaml 5.1 (installed through anaconda)

I feel like I'm missing something incredibly obvious, but even copy-pasting the example from the docs (with the Cave Spider) raises the same error.

[felix-schneider]

My apologies, this is a duplicate of #266, I'm closing this.

The semantic difference between yaml.unsafe_load(text) and yaml.load(text, Loader=yaml.Loader) is very counterintuitive.