--- a
+++ b/Concurrent.ipynb
@@ -0,0 +1,90 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Concurrent.Futures.ThreadPoolExecutor"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 14,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from concurrent.futures import ThreadPoolExecutor  #using parallel threads \n",
+    "import time #time module"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def task(n):\n",
+    " print(\"Processing {}\".format(n))\n",
+    " time.sleep(10)     #time.sleep pause the program. So it can be used to chech working of multiple thread"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 11,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "def main():\n",
+    " print(\"Starting ThreadPoolExecutor\")\n",
+    " with ThreadPoolExecutor(max_workers=3) as executor:\n",
+    "   future = executor.submit(task, (2))  #working of multiple threads\n",
+    "   future = executor.submit(task, (3))\n",
+    "   future = executor.submit(task, (4))\n",
+    " print(\"All tasks complete\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 13,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Starting ThreadPoolExecutor\n",
+      "Processing 2\n",
+      "Processing 3\n",
+      "Processing 4\n",
+      "All tasks complete\n"
+     ]
+    }
+   ],
+   "source": [
+    "if __name__ == '__main__':\n",
+    " main()   #main function"
+   ]
+  }
+ ],
+ "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": "2.7.15"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}