New update to make the code run in multi tasks (larger than Ncpu) to avoid the memery issue in parallel

Author: weiguangcui

doc/Test-pymgal.ipynb

@@ -372,22 +372,23 @@
   }
  ],
  "metadata": {
+  "hide_input": false,
   "kernelspec": {
-   "display_name": "Python 2",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "python2"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 2
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.10"
+   "pygments_lexer": "ipython3",
+   "version": "3.6.7"
   },
   "latex_envs": {
    "LaTeX_envs_menu_present": true,