Use(bool) doesn't properly validate boolean strings.

[EdEngle]

Use(bool) will return True for strings that should be false.

t = Schema({"test_bool": Use(bool)})
t.validate({"test": "false"})

the code above will return {'test': True}

I would recommend using distutils.util.strtobool to convert strings to booleans. This will convert things like "TRUE", "True", "true", "T", 1 to True and it will convert "FALSE", "False", "false", "F", "f", 0 to False.

[EdEngle]

FYI to those wondering you can do this....

def convert_bool(input_bool):
    return bool(strtobool(str(input_bool)))

t = Schema({"test_bool": Use(convert_bool)})
t.validate({"test": "false"})

And that will evaluate test to False correctly.