Skip to content

complete lab-python-lambda-map-reduce-filter #137

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
synergeo wants to merge 1 commit into
base: master
Choose a base branch
from
Open

complete lab-python-lambda-map-reduce-filter #137

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
175 changes: 143 additions & 32 deletions lab-python-lambda-map-reduce-filter.ipynb
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -94,12 +94,35 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 1,
"id": "0781335d-39cf-403d-b86a-ca908a09fe55",
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"[(-1200, 'debit'), (-100, 'debit'), (-250, 'debit'), (-300, 'debit'), (-850, 'debit')]\n"
]
}
],
"source": [
"# your code goes here"
"transactions = [\n",
" (-1200, 'debit'),\n",
" (2500, 'credit'),\n",
" (-100, 'debit'),\n",
" (850, 'credit'),\n",
" (-250, 'debit'),\n",
" (1500, 'credit'),\n",
" (-300, 'debit'),\n",
" (5000, 'credit'),\n",
" (-850, 'debit'),\n",
" (1000, 'credit')\n",
"]\n",
"\n",
"debits = list(filter(lambda transaction: transaction[1] == 'debit', transactions))\n",
"\n",
"print(debits)"
]
},
{
Expand All @@ -124,12 +147,28 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 2,
"id": "25073469-7258-4fc6-b0a0-ef8ea57688fe",
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"[(-100, 'debit'), (-250, 'debit'), (-300, 'debit'), (-850, 'debit'), (-1200, 'debit')]\n"
]
}
],
"source": [
"# your code goes here"
"sort_descending = lambda transaction: transaction[0]\n",
"\n",
"debits_descending = sorted(\n",
" debits,\n",
" key=sort_descending,\n",
" reverse=True\n",
")\n",
"\n",
"print(debits_descending)"
]
},
{
Expand Down Expand Up @@ -158,23 +197,31 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 4,
"id": "e1de9d03-f029-4e2e-9733-ae92e3de7527",
"metadata": {},
"outputs": [],
"source": [
"# create list of bank account balances\n",
"balances = [100, 50, -25, 1000, -10]"
]
},
{
"cell_type": "code",
"execution_count": null,
"id": "2f253b7e-5300-4819-b38f-9fc090554f51",
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"[105.0, 52.5, -26.25, 1050.0, -10.5]\n"
]
}
],
"source": [
"# your code goes here"
"# Original bank account balances\n",
"balances = [100, 50, -25, 1000, -10]\n",
"\n",
"# Interest rate of 5%\n",
"interest_rate = 0.05\n",
"\n",
"# Apply one year of interest to every balance\n",
"new_balances = list(\n",
" map(lambda balance: balance * (1 + interest_rate), balances)\n",
")\n",
"\n",
"print(new_balances)"
]
},
{
Expand Down Expand Up @@ -209,12 +256,36 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 5,
"id": "0906a9b0-d567-4786-96f2-5755611b885e",
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"[{'balance': 1020.0, 'interest_rate': 0.02}, {'balance': 2020.0, 'interest_rate': 0.01}, {'balance': 515.0, 'interest_rate': 0.03}]\n"
]
}
],
"source": [
"# your code goes here\n"
"accounts = [\n",
" {'balance': 1000, 'interest_rate': 0.02},\n",
" {'balance': 2000, 'interest_rate': 0.01},\n",
" {'balance': 500, 'interest_rate': 0.03},\n",
"]\n",
"\n",
"updated_accounts = list(\n",
" map(\n",
" lambda account: {\n",
" 'balance': account['balance'] * (1 + account['interest_rate']),\n",
" 'interest_rate': account['interest_rate']\n",
" },\n",
" accounts\n",
" )\n",
")\n",
"\n",
"print(updated_accounts)\n"
]
},
{
Expand Down Expand Up @@ -243,14 +314,39 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 6,
"id": "6284dbd3-e117-411e-8087-352be6deaed4",
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"Negative balances: [-26.25, -10.5]\n",
"Total negative balance: -36.75\n"
]
}
],
"source": [
"from functools import reduce\n",
"\n",
"# your code goes here"
"# Balances after adding 5% interest\n",
"new_balances = [105.0, 52.5, -26.25, 1050.0, -10.5]\n",
"\n",
"# Keep only negative balances\n",
"negative_balances = list(\n",
" filter(lambda balance: balance < 0, new_balances)\n",
")\n",
"\n",
"# Add all negative balances together\n",
"total_negative_balance = reduce(\n",
" lambda total, balance: total + balance,\n",
" negative_balances,\n",
" 0\n",
")\n",
"\n",
"print(\"Negative balances:\", negative_balances)\n",
"print(\"Total negative balance:\", total_negative_balance)"
]
},
{
Expand All @@ -273,26 +369,41 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 7,
"id": "da2264b5-298e-4b45-99df-852b94e90d15",
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"[650, 1600, 275]\n"
]
}
],
"source": [
"accounts = [\n",
" {'balance': 1000, 'withdrawals': [100, 50, 200]},\n",
" {'balance': 2000, 'withdrawals': [300, 100]},\n",
" {'balance': 500, 'withdrawals': [50, 100, 75]},\n",
"]\n",
"\n",
"# your code goes here\n"
"def calculate_balance(account):\n",
" total_withdrawals = sum(account['withdrawals'])\n",
" remaining_balance = account['balance'] - total_withdrawals\n",
" return remaining_balance\n",
"\n",
"remaining_balances = list(map(calculate_balance, accounts))\n",
"\n",
"print(remaining_balances)"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "Python [conda env:anaconda3] *",
"language": "python",
"name": "python3"
"name": "conda-env-anaconda3-py"
},
"language_info": {
"codemirror_mode": {
Expand All @@ -304,7 +415,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.9"
}
},
"nbformat": 4,
Expand Down