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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 cpmap(cores=1):
 """Configurable parallel map context manager. Returns appropriate map compatible function based on configuration: - Local single core (the default) - Multiple local cores """

    if int(cores) == 1:
        yield itertools.imap
    else:
        if futures is None:
            raise ImportError("concurrent.futures not available")
        pool = futures.ProcessPoolExecutor(cores)
        yield pool.map
        pool.shutdown()