How to convert a string (describing arrays) into an array in python : <p>I have this string:</p>

<pre><code>'[[57.7322273254, -58.8288497925, -54.460193634, 28.4842605591, -45.9620323181, -13.6266260147, -17.2981243134, -15.1332969666, -15.1287126541, -2.44765377045, -0.488036692142, -9.05566310883, -4.70651531219], [72.5999526978, -83.4902877808, -16.4493045807, 40.4356307983, -33.9553756714, -10.7394323349, -17.31067276, -15.6521835327, -25.1421508789, -13.1496963501, -4.11457395554, -14.9144859314, -5.76139545441]]'
</code></pre>

<p>I would like to convert this string into a numpy array of arrays</p>
