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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 _list2Rlist(xs):
 """ convert a python list to an R list """

    if isinstance(xs, six.string_types):
        xs = [xs]
    rlist = ",".join([_quotestring(x) for x in xs])
    return "c(" + rlist + ")"