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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 CopyNoFail(src, root=None):
 """ Just copy fName into the current working directory, if it exists. No action is executed, if fName does not exist. No Hash is checked. Args: src: The filename we want to copy to '.'. root: The optional source dir we should pull fName from. Defaults to benchbuild.settings.CFG["tmpdir"]. Returns: True, if we copied something. """

    if root is None:
        root = str(CFG["tmp_dir"])
    src_path = local.path(root) / src

    if src_path.exists():
        Copy(src_path, '.')
        return True
    return False