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How to Create List of Dictionary in Python Using For Loop
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‎Array/Create Dictionary from the List-Python.ipynb

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{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Using dictionary 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": 1,
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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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"{'def_key_gfg': 'gfg', 'def_key_is': 'is', 'def_key_best': 'best'}\n"
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]
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}
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],
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"source": [
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"a = [\"gfg\", \"is\", \"best\"]\n",
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"k = \"def_key_\"\n",
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"res = {f\"{k}{ele}\": ele for ele in a}\n",
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"print(res)"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Using map()"
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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": 1,
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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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"{'def_keygtg': 'gtg', 'def_keyis': 'is', 'def_keydesi': 'desi'}\n"
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]
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}
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],
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"source": [
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"a = [\"gtg\", \"is\", \"desi\"]\n",
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"k = \"def_key\"\n",
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"res = dict(zip(map(lambda x: k+ x,a), a))\n",
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"print(res)"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Using dict.fromkeys()"
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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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"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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"{'dict_key_gfg': 'gfg', 'dict_key_is': 'is', 'dict_key_best': 'best'}\n"
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]
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}
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],
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"source": [
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"a = [\"gfg\", \"is\", \"best\"]\n",
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"k = \"dict_key_\"\n",
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"res = dict.fromkeys(map(lambda x:k+x,a))\n",
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"for ele in a:\n",
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" res[k+ele] = ele\n",
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"print(res)"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Using for loop"
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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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"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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"{'def_keygfg': 'gfg', 'def_keyis': 'is', 'def_keybest': 'best'}\n"
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]
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}
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],
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"source": [
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"a = [\"gfg\", \"is\", \"best\"]\n",
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"k = \"def_key\"\n",
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"res = {}\n",
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"for ele in a:\n",
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" res[k + ele] = ele\n",
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"print(res)"
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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",
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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": "3.12.9"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 2
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}

‎Array/Create Nested Dictionary using given List.ipynb

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{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Using zip()"
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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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"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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"{8: {'Gfg': 4}, 3: {'is': 5}, 2: {'best': 9}}\n"
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]
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}
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],
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"source": [
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"a = {\"Gfg\": 4, \"is\": 5, \"best\": 9}\n",
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"b = [8,3,2]\n",
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"res = {key: {k:v} for key,(k,v) in zip(b,a.items())}\n",
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"print(res)"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Using for loop\n"
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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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"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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"{8: {8: 4}, 3: {3: 5}, 2: {2: 9}}\n"
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]
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}
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],
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"source": [
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"a = {\"Gfg\": 4, \"is\": 5, \"best\": 9}\n",
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"b = [8,3,2]\n",
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"res = {}\n",
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"for key, (k,v) in zip(b,a.items()):\n",
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" res[key] = {key:v}\n",
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"print(res)"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Using dict()"
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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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"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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"{8: {'Gfg': 4}, 3: {'is': 5}, 2: {'best': 9}}\n"
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]
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}
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],
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"source": [
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"a: dict[str, int] = {\"Gfg\": 4, \"is\": 5, \"best\": 9}\n",
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"b: list[int] = [8, 3, 2]\n",
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"\n",
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"res: dict[int, dict[str, int]] = dict(\n",
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" map(lambda key_val: (key_val[0], {key_val[1][0]: key_val[1][1]}), zip(b, a.items()))\n",
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")\n",
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"print(res)"
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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",
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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": "3.12.9"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 2
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}

‎Array/How to Create List of Dictionary in Python Using For Loop.ipynb

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{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## How to Create List of Dictionary in Python Using For Loop"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## 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": 1,
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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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"[{'key': 0, 'value': 0}, {'key': 1, 'value': 2}, {'key': 2, 'value': 4}]\n"
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]
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}
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],
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"source": [
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"a = ['key', 'value']\n",
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"b = [dict(zip(a, [i, i*2])) for i in range(3)]\n",
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"print(b)"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Using dictionary 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": 3,
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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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"[{'key': 0, 'value': 0}, {'key': 1, 'value': 2}, {'key': 2, 'value': 4}]\n"
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]
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}
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],
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"source": [
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"a = [\"key\", \"value\"]\n",
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"b = [{k: (i if k == \"key\" else i *2) for k in a } for i in range(3)]\n",
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"print(b)"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"## Using append"
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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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"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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"[{'key': 0, 'value': 0}, {'key': 1, 'value': 2}, {'key': 2, 'value': 4}]\n"
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]
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}
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],
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"source": [
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"a = ['key', 'value']\n",
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"b: list[dict[str, int]] = []\n",
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"for i in range(3):\n",
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" b.append(dict(zip(a, [i, i*2])))\n",
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"print(b)"
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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",
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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": "3.12.9"
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}
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},
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"nbformat": 4,
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"nbformat_minor": 2
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}

‎Array/Python Create Dictionary from List with Default Values.ipynb

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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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"execution_count": null,
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"metadata": {},
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"outputs": [
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{
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}
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],
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"source": [
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"keys: set[str] = {'a','b','c','d'}\n",
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"d = 0\n",
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"res: dict[str, int] = {\n",
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"\n",
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"}\n",
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"keys: set[str] = {\"a\", \"b\", \"c\", \"d\"}\n",
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"d = 0\n",
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"res: dict[str, int] = {}\n",
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"for key in keys:\n",
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" res[key] = 0\n",
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"print(res)"

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