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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _get_schema(modules):
 """Load the config schema for the provided modules. NOTE: this schema is intended to have 1-1 relationship with they keys in the default config and is used a means to verify valid overrides provided by the user. :param modules: stack modules config schema to lookup. :returns: modules default schema dictionary. """

    schema = os.path.join(os.path.dirname(__file__),
                          'defaults/%s.yaml.schema' % (modules))
    return yaml.safe_load(open(schema))