fix url bugs

Author: lijin-THU

01. python tools/01.01 python overview.ipynb 01-python-tools/01.01-python-overview.ipynb

@@ -1,50 +1,50 @@
-{
- "cells": [
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "# Ipython notebook"
-   ]
-  },
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "在命令行下输入命令：\n",
-    "\n",
-    "    ipython notebook\n",
-    "\n",
-    "会打开一个notebook本地服务器，一般地址是 http://localhost:8888\n",
-    "\n",
-    "**`ipython notebook`** 支持两种模式的cell：\n",
-    "\n",
-    "* Markdown\n",
-    "* Code\n",
-    "\n",
-    "这里不做过多介绍。"
-   ]
-  }
- ],
- "metadata": {
-  "kernelspec": {
-   "display_name": "Python 2",
-   "language": "python",
-   "name": "python2"
-  },
-  "language_info": {
-   "codemirror_mode": {
-    "name": "ipython",
-    "version": 2
-   },
-   "file_extension": ".py",
-   "mimetype": "text/x-python",
-   "name": "python",
-   "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.10"
-  }
- },
- "nbformat": 4,
- "nbformat_minor": 0
-}
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Ipython notebook"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "在命令行下输入命令：\n",
+    "\n",
+    "    ipython notebook\n",
+    "\n",
+    "会打开一个notebook本地服务器，一般地址是 http://localhost:8888\n",
+    "\n",
+    "**`ipython notebook`** 支持两种模式的cell：\n",
+    "\n",
+    "* Markdown\n",
+    "* Code\n",
+    "\n",
+    "这里不做过多介绍。"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 2
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython2",
+   "version": "2.7.10"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 0
+}