<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def _jcols(self, *cols):
 """Return a JVM Seq of Columns from a list of Column or column names If `cols` has only one list in it, cols[0] will be used as the list. """

        if len(cols) == 1 and isinstance(cols[0], list):
            cols = cols[0]
        return self._jseq(cols, _to_java_column)