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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 evaluate_block(self, template, context=None, escape=None, safe_wrapper=None):
 """Evaluate a template block."""

        if context is None:
            context = {}

        try:
            with self._evaluation_context(escape, safe_wrapper):
                template = self._environment.from_string(template)
                return template.render(**context)
        except jinja2.TemplateError as error:
            raise EvaluationError(error.args[0])
        finally:
            self._escape = None