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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 translate_escaped_str(cls, str_val):
 """Reusable by most interpreters"""

        if isinstance(str_val, string_types):
            str_val = str_val.encode('unicode_escape')
            if sys.version_info >= (3, 0):
                str_val = str_val.decode('utf-8')
            str_val = str_val.replace('"', r'\"')
        return '"{}"'.format(str_val)