diff --git a/_doc/notebooks/pandas/pandas_groupby.ipynb b/_doc/notebooks/pandas/pandas_groupby.ipynb
index cd8318db..4acf9e50 100644
--- a/_doc/notebooks/pandas/pandas_groupby.ipynb
+++ b/_doc/notebooks/pandas/pandas_groupby.ipynb
@@ -11,7 +11,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": null,
+      "execution_count": 1,
       "metadata": {
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       },
@@ -132,7 +132,7 @@
               "<IPython.core.display.HTML object>"
             ]
           },
-          "execution_count": null,
+          "execution_count": 2,
           "metadata": {},
           "output_type": "execute_result"
         }
@@ -153,7 +153,7 @@
     },
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-      "execution_count": null,
+      "execution_count": 3,
       "metadata": {
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       },
@@ -203,7 +203,7 @@
               "3   NaN   4"
             ]
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-          "execution_count": null,
+          "execution_count": 4,
           "metadata": {},
           "output_type": "execute_result"
         }
@@ -217,7 +217,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": null,
+      "execution_count": 5,
       "metadata": {
         "collapsed": false
       },
@@ -257,7 +257,7 @@
               "10.0  20"
             ]
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-          "execution_count": null,
+          "execution_count": 6,
           "metadata": {},
           "output_type": "execute_result"
         }
@@ -275,7 +275,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": null,
+      "execution_count": 7,
       "metadata": {
         "collapsed": false
       },
@@ -319,7 +319,7 @@
               "2   NaN   7"
             ]
           },
-          "execution_count": null,
+          "execution_count": 8,
           "metadata": {},
           "output_type": "execute_result"
         }
@@ -338,7 +338,7 @@
     },
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-      "execution_count": null,
+      "execution_count": 9,
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diff --git a/_doc/notebooks/python/gil_example.ipynb b/_doc/notebooks/python/gil_example.ipynb
index e7d54f63..85413974 100644
--- a/_doc/notebooks/python/gil_example.ipynb
+++ b/_doc/notebooks/python/gil_example.ipynb
@@ -11,7 +11,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": null,
+      "execution_count": 1,
       "metadata": {},
       "outputs": [
         {
@@ -141,7 +141,7 @@
               "<IPython.core.display.HTML object>"
             ]
           },
-          "execution_count": null,
+          "execution_count": 2,
           "metadata": {},
           "output_type": "execute_result"
         }
@@ -162,7 +162,7 @@
     },
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-      "execution_count": null,
+      "execution_count": 3,
       "metadata": {},
       "outputs": [
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@@ -194,7 +194,7 @@
     },
     {
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-      "execution_count": null,
+      "execution_count": 4,
       "metadata": {},
       "outputs": [
         {
@@ -234,7 +234,7 @@
     },
     {
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-      "execution_count": null,
+      "execution_count": 5,
       "metadata": {},
       "outputs": [
         {
@@ -257,7 +257,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": null,
+      "execution_count": 6,
       "metadata": {},
       "outputs": [
         {
@@ -288,7 +288,7 @@
     },
     {
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-      "execution_count": null,
+      "execution_count": 7,
       "metadata": {
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diff --git a/_doc/notebooks/python/notebook_template.ipynb b/_doc/notebooks/python/notebook_template.ipynb
index 5217eb43..feac8b41 100644
--- a/_doc/notebooks/python/notebook_template.ipynb
+++ b/_doc/notebooks/python/notebook_template.ipynb
@@ -11,7 +11,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": null,
+      "execution_count": 1,
       "metadata": {},
       "outputs": [
         {
@@ -141,7 +141,7 @@
               "<IPython.core.display.HTML object>"
             ]
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-          "execution_count": null,
+          "execution_count": 2,
           "metadata": {},
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@@ -169,7 +169,7 @@
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+      "execution_count": 3,
       "metadata": {
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