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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 ensure_path(path, mode=0o777):
 """Ensure that path exists in a multiprocessing safe way. If the path does not exist, recursively create it and its parent directories using the provided mode. If the path already exists, do nothing. The umask is cleared to enable the mode to be set, and then reset to the original value after the mode is set. Parameters path : str file system path to a non-existent directory that should be created. mode : int octal representation of the mode to use when creating the directory. Raises ------ OSError If os.makedirs raises an OSError for any reason other than if the directory already exists. """


    if path:
        try:
            umask = os.umask(000)
            os.makedirs(path, mode)
            os.umask(umask)
        except OSError as e:
            if e.errno != errno.EEXIST:
                raise