not-context-manager:23:0::Context manager 'NotAManager' doesn't implement __enter__ and __exit__.
not-context-manager:37:0::Context manager 'dec' doesn't implement __enter__ and __exit__.
not-context-manager:55:0::Context manager 'int' doesn't implement __enter__ and __exit__.
not-context-manager:90:0::Context manager 'int' doesn't implement __enter__ and __exit__.
not-context-manager:134:0::Context manager 'generator' doesn't implement __enter__ and __exit__.
