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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 _clean_path(path):
 """Create a fully fissile absolute system path with no symbolic links and environment variables"""

        path = path.replace('"', '')
        path = path.replace("'", '')
        # Replace ~ with /home/user
        path = os.path.expanduser(path)
        # Replace environment variables
        path = os.path.expandvars(path)
        # If the path is relative, assume it is relative to the config file directory
        if not os.path.isabs(path):
            path = os.path.join(config.global_config.path, path)
        # Clean path, e.g. replace /./ with /
        path = os.path.abspath(path)
        # Eliminate symbolic links
        path = os.path.realpath(path)
        return path