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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 render_field_description(field):
 """ Render a field description as HTML. """

    if hasattr(field, 'description') and field.description != '':
        html = """<p class="help-block">{field.description}</p>"""
        html = html.format(
            field=field
        )
        return HTMLString(html)
    
    return ''