Add conditional installation of sh

Author: gjbex

Diff for: hands-on/system_information.ipynb

@@ -12,29 +12,25 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "Install `sh` since it doesn't seem to be available."
+    "Install `sh` if it doesn't seem to be available."
    ]
   },
   {
    "cell_type": "code",
    "execution_count": null,
    "metadata": {},
    "outputs": [],
-   "source": [
-    "!pip install sh"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": 1,
-   "metadata": {},
-   "outputs": [],
    "source": [
     "from datetime import datetime\n",
     "import os\n",
     "import platform\n",
     "import psutil\n",
-    "import sh\n",
+    "try:\n",
+    "    import sh\n",
+    "except ModuleNotFoundError:\n",
+    "    print('installing sh using pip')\n",
+    "    !pip install sh\n",
+    "    import sh\n",
     "import sys"
    ]
   },
@@ -228,7 +224,7 @@
    "outputs": [],
    "source": [
     "for process in psutil.process_iter():\n",
-    "    if 'chrome' in process.name():\n",
+    "    if 'python' in process.name():\n",
     "        cpu_times = process.cpu_times()\n",
     "        thread_str = f'threads: {process.num_threads()}'\n",
     "        cpu_str = f'user: {cpu_times.user}, sys: {cpu_times.system}'\n",
@@ -317,7 +313,8 @@
    "outputs": [],
    "source": [
     "for user in psutil.users():\n",
-    "    started = datetime.strftime(datetime.fromtimestamp(user.started), '%Y-%m-%d %H:%M:%S')\n",
+    "    started = datetime.strftime(datetime.fromtimestamp(user.started),\n",
+    "                                '%Y-%m-%d %H:%M:%S')\n",
     "    print(f'{user.name}: {started}')"
    ]
   },
@@ -435,7 +432,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.9.6"
+   "version": "3.11.3"
   }
  },
  "nbformat": 4,