ll be treated as float</span>
<span class="sd">        period: float or int or str</span>
<span class="sd">            The user can specify period either in count or proportion of database size.</span>
<span class="sd">            If the program detects the data type of period is integer, then it treats period is expressed in count.</span>
<span class="sd">            Otherwise, it will be treated as float.</span>
<span class="sd">            Example: period=10 will be treated as integer, while period=10.0 