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List data type program and pickle file
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‎List_data_type.ipynb

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{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": 1,
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"id": "5f415a44",
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"metadata": {},
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"outputs": [],
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"source": [
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"# create a list of integers\n",
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"my_list = [1, 2, 3, 4, 5]"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 2,
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"id": "65f31300",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"[1, 2, 3, 4, 5]\n"
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]
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}
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],
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"source": [
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"# print the list\n",
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"print(my_list)"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 3,
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"id": "bfc368b1",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"1\n"
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]
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}
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],
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"source": [
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"# access an element in the list\n",
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"print(my_list[0]) # prints 1"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 4,
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"id": "f0794d3d",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"[1, 6, 3, 4, 5]\n"
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]
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}
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],
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"source": [
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"# change an element in the list\n",
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"my_list[1] = 6\n",
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"print(my_list) # prints [1, 6, 3, 4, 5]"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 5,
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"id": "fe1ec520",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"[1, 6, 3, 4, 5, 6]\n"
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]
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}
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],
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"source": [
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"# add an element to the end of the list\n",
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"my_list.append(6)\n",
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"print(my_list) # prints [1, 6, 3, 4, 5, 6]"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 6,
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"id": "681f2fd8",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"[1, 6, 4, 5, 6]\n"
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]
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}
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],
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"source": [
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"# remove an element from the list\n",
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"my_list.remove(3)\n",
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"print(my_list) # prints [1, 6, 4, 5, 6]"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 7,
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"id": "bdf120bb",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"5\n"
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]
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}
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],
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"source": [
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"# get the length of the list\n",
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"print(len(my_list)) # prints 5"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 8,
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"id": "e74c822d",
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"metadata": {},
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"outputs": [],
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"source": [
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"# create a list of mixed data types\n",
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"mixed_list = [\"apple\", 1, \"banana\", 2]"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 9,
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"id": "fc6ed793",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"['apple', 1, 'banana', 2]\n"
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]
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}
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],
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"source": [
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"# print the list\n",
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"print(mixed_list) # prints [\"apple\", 1, \"banana\", 2]"
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]
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},
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{
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"cell_type": "code",
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"execution_count": 10,
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"id": "35d8d2d2",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"apple\n"
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]
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}
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],
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"source": [
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"# access an element in the list\n",
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"print(mixed_list[0]) # prints \"apple\""
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]
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},
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{
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"cell_type": "code",
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"execution_count": 11,
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"id": "32e03d22",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"['apple', 'orange', 'banana', 2]\n"
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]
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}
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],
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"source": [
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"# change an element in the list\n",
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"mixed_list[1] = \"orange\"\n",
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"print(mixed_list) # prints [\"apple\", \"orange\", \"banana\", 2]"
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]
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},
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{
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"cell_type": "markdown",
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"id": "24e2e981",
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"metadata": {},
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"source": [
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"## Write a Python function that takes a list of integers as input and returns the sum of all the even numbers in the list."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 12,
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"id": "33974f61",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"The sum of all even number in a list:30\n"
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]
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}
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],
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"source": [
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"def sum_even_num(number):\n",
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" sum = 0 # initialize a variable to hold the sum of even numbers \n",
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" \n",
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" # iterate over the numbers in the list\n",
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" for num in number:\n",
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" # check if the number is even\n",
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" if num % 2 == 0:\n",
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" # add the even number to the sum\n",
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" sum += num\n",
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" \n",
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" # return the sum of even numbers\n",
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" return sum\n",
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"\n",
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"number = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\n",
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"\n",
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"result = sum_even_num(number)\n",
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"\n",
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"print(f\"The sum of all even number in a list:{result}\") # prints 30, which is the sum of 2 + 4 + 6 + 8 + 10"
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]
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},
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{
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"cell_type": "markdown",
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"id": "a7e46446",
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"metadata": {},
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"source": [
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"## Write a python code for sum of all the even numbers in the list by using filter, lambda and reduce function."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 13,
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"id": "def0b891",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"The sum of all even number in a list:30\n"
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]
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}
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],
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"source": [
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"from functools import reduce\n",
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"\n",
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"number = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\n",
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"\n",
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"even_numbers = filter(lambda x: x % 2 == 0, number) # use a lambda function to filter out even numbers from the list.\n",
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"\n",
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"sum_even_num = reduce(lambda x, y: x + y, even_numbers) # use a lambda function to find the sum of the filtered even numbers.\n",
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"\n",
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"print(f\"The sum of all even number in a list:{sum_even_num}\") # prints 30, which is the sum of 2 + 4 + 6 + 8 + 10"
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]
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},
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{
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"cell_type": "markdown",
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"id": "a10e3112",
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"metadata": {},
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"source": [
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"## Write a python code for sum of all the even numbers in the list by using List Comprehension."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 14,
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"id": "799e6080",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"The sum of all even number in a list:30\n"
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]
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}
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],
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"source": [
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"number = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\n",
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"\n",
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"even_numbers = [num for num in number if num % 2 == 0] # use list comprehension to filter out even numbers from the list\n",
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"\n",
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"sum_even_numbers = sum(even_numbers) # use the built-in sum() function to calculate the sum of the filtered even numbers\n",
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"\n",
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"print(f\"The sum of all even number in a list:{sum_even_numbers}\") # prints 30, which is the sum of 2 + 4 + 6 + 8 + 10"
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]
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},
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{
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"cell_type": "markdown",
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"id": "40276043",
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"metadata": {},
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"source": [
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"## Create a pickle file "
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]
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},
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{
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"cell_type": "code",
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"execution_count": 15,
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"id": "9d26cfda",
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"metadata": {},
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"outputs": [],
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"source": [
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"import pickle\n",
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"# create a pickle file with the result\n",
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"with open('result.pickle', 'wb') as file:\n",
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" pickle.dump(result, file)"
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]
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},
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{
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"cell_type": "markdown",
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"id": "c66e8b62",
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"metadata": {},
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"source": [
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"* Finally, we create a pickle file named result.pickle to store the result of the function call.\n",
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"* We open the file in binary mode using the 'wb' mode flag, \n",
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"* We use the pickle.dump() function to write the result to the file."
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]
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},
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{
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"cell_type": "code",
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"execution_count": 16,
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"id": "ba668092",
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"metadata": {},
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"outputs": [
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{
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"name": "stdout",
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"output_type": "stream",
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"text": [
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"30\n"
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]
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}
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],
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"source": [
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"# read the result from the pickle file\n",
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"with open('result.pickle', 'rb') as file:\n",
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" result = pickle.load(file)\n",
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"\n",
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"print(result) # prints 30, which is the sum of 2 + 4 + 6 + 8 + 10"
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]
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},
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{
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"cell_type": "markdown",
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"id": "4821b858",
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"metadata": {},
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"source": [
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"* We open the result.pickle file in binary mode using the 'rb' mode flag.\n",
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"* We use the pickle.load() function to read the result from the file. \n",
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"* The result is then printed, which should be the same as the result obtained from calling the sum_even_numbers function."
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3 (ipykernel)",
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"language": "python",
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"name": "python3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.9.12"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 5
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}

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