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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 run_steps(spec, language="en"):
 """ Can be called by the user from within a step definition to execute other steps. """


    # The way this works is a little exotic, but I couldn't think of a better way to work around
    # the fact that this has to be a global function and therefore cannot know about which step
    # runner to use (other than making step runner global)
    
    # Find the step runner that is currently running and use it to run the given steps
    fr = inspect.currentframe()
    while fr:
        if "self" in fr.f_locals:
            f_self = fr.f_locals['self']
            if isinstance(f_self, StepsRunner):
                return f_self.run_steps_from_string(spec, language)
        fr = fr.f_back