diff --git a/Seminar_1/seminar_1_empty.ipynb b/Seminar_1/seminar_1_empty.ipynb
new file mode 100644
index 0000000..687e135
--- /dev/null
+++ b/Seminar_1/seminar_1_empty.ipynb
@@ -0,0 +1,506 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "fa9e11ab",
+   "metadata": {},
+   "source": [
+    "# Seminar: Lists, dictionaries, functions, exceptions\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "239ab00a-b400-4a6b-a51f-780c76eb3f3e",
+   "metadata": {
+    "tags": []
+   },
+   "source": [
+    "### Task 0. \n",
+    "Write a loop which will add \"_adj\" to the each element of the list:\n",
+    "[\"close\", \"open\", \"high\", \"high\"]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "cf359ec2-8f2b-4570-b075-a3bf5afd73ff",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "my_list = [\"close\", \"open\", \"high\", \"high\"]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "0d51f0d0-cdf4-4eda-9288-07d00c0b8906",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "markdown",
+   "id": "9d88e376-d4f8-43e5-8131-29eb944a9ced",
+   "metadata": {},
+   "source": [
+    "Do the same but write all of the code in one line (list comprehension)."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "50ab8814-f05b-4ed0-9099-d9d761fe98ff",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "my_list = [\"close\", \"open\", \"high\", \"high\"]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d329b4d6-7b43-431e-a670-fdd78799c1c6",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d0dda828",
+   "metadata": {},
+   "source": [
+    "### Task 1. \n",
+    "\n",
+    "Write a function which will sum up all values in the list"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "1401ca62",
+   "metadata": {},
+   "source": [
+    "#### a. For the case when input is list of integers."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f6d17a45-c02d-43e5-ae03-144d79d7121c",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "my_list_int = [0, 1, 1, 2, 3, 5, 8, 13]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "8750cd32",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "fefdbef8",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "sum_up(my_list_int)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "e06770f1",
+   "metadata": {},
+   "source": [
+    "#### b. What will be if the input is list of strings?"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f07c53c5-edc2-473c-80c4-b141c3a85c27",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "my_list_str = ['0', 'a', '1', 'bb', 'ccc', '5', '8', '13']"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "10ec1e55-5ea2-4e4d-86c0-985f118e2802",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "sum_up(my_list_str)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "6f214987-4948-4afb-85fb-4a140196d051",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# change the function in order to avoid error and get the answer: '0a1bbccc5813'"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "c4aa17cc",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "10fac1f0",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "sum_up_str(my_list_str)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d67d8c92",
+   "metadata": {},
+   "source": [
+    "#### c. Rewrite the function sum_up in the way, that we will get a message 'can not sum it up' if the summation can't be performed"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "461057db-76ed-45ce-9195-94e7449b8042",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "mixed_list = [1, 4, 'd']"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "7b489ffb-38d3-46e5-b150-ed2c8470dda3",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "2c31130b-b976-4861-9609-484d8a22ff72",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "sum_up_except(mixed_list)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "93ba0f67-a433-4104-a57a-7a897d3dcf2b",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "# return nothing if the summation can not be performed "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "fb521cf9-ba60-49ef-b144-8448c2f8c908",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "759ddcbd-076c-4135-bbb2-b4bc9159248a",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "sum_up_except(mixed_list)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "3240b759",
+   "metadata": {},
+   "source": [
+    "#### d. Why do we need to write the exceptions?"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ad2390cf",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "print('Step 1')\n",
+    "print(f'Step 2: {sum_up_except([1, 4, \"d\"])}')\n",
+    "print('Step 3')"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "ec92a671",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "print('Step 1')\n",
+    "print(f'Step 2: {sum_up([1, 4, \"d\"])}')\n",
+    "print('Step 3')"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "278db275",
+   "metadata": {},
+   "source": [
+    "### Task 2."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "d3d3a943",
+   "metadata": {},
+   "source": [
+    "In this task we will work with the dictionary:"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "id": "eba4a98b",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "dic_food = {'apple':5, 'orange':4, 'onion':9}"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "3074601e",
+   "metadata": {},
+   "source": [
+    "#### a. Calculate how many products in total do we have. How many fruits?"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "65fc0173",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "f35e6c38",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "c205408f",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "list_fruits = ['apple', 'orange']"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "a3ca5ec2",
+   "metadata": {},
+   "source": [
+    "#### b. Add one more apple and change the numbers of onions to 1"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d85c63a1",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "831fe4ba",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "0b9ace80",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "6d513519",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "9e7d3831",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": []
+  },
+  {
+   "cell_type": "markdown",
+   "id": "7c03197c",
+   "metadata": {},
+   "source": [
+    "#### c. Make the same dictionary from the lists: "
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "cc3b305e",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "prod_name = ['apple', 'orange', 'onion']\n",
+    "prod_amount = [1,5,5]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "6672ef13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "new_dict = {name:amount for name,amount in zip(prod_name, prod_amount)}\n",
+    "new_dict"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "3649c1cb",
+   "metadata": {},
+   "source": [
+    "#### d. What will happened if we have dublicates in the list of keys?"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "c66a0a13",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "prod_name = ['apple', 'orange', 'onion', 'apple']\n",
+    "prod_amount = [1,5,3,2]"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "a1188206",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.6"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}