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Solved lab #107

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149 changes: 126 additions & 23 deletions lab-python-lambda-map-reduce-filter.ipynb
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Original file line number Diff line number Diff line change
Expand Up @@ -94,12 +94,31 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 1,
"id": "0781335d-39cf-403d-b86a-ca908a09fe55",
"metadata": {},
"outputs": [],
"outputs": [
{
"data": {
"text/plain": [
"[(2500, 'credit'),\n",
" (850, 'credit'),\n",
" (1500, 'credit'),\n",
" (5000, 'credit'),\n",
" (1000, 'credit')]"
]
},
"execution_count": 1,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"# your code goes here"
"transactions = [(-1200, 'debit'), (2500, 'credit'), (-100, 'debit'), (850, 'credit'), (-250, 'debit'), (1500, 'credit'), (-300, 'debit'), (5000, 'credit'), (-850, 'debit'), (1000, 'credit')]\n",
"#Create a new list called credits that includes all of the debit transactions from the list transactions. Use the filter () function.\n",
"credits = list(filter(lambda x: x[1] == 'credit', transactions))\n",
"\n",
"credits"
]
},
{
Expand All @@ -124,12 +143,37 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 2,
"id": "25073469-7258-4fc6-b0a0-ef8ea57688fe",
"metadata": {},
"outputs": [],
"outputs": [
{
"data": {
"text/plain": [
"[(-100, 'debit'),\n",
" (-250, 'debit'),\n",
" (-300, 'debit'),\n",
" (-850, 'debit'),\n",
" (-1200, 'debit')]"
]
},
"execution_count": 2,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"# your code goes here"
"# Create a list of debit transactions\n",
"debits = list(filter(lambda x: x[1] == 'debit', transactions))\n",
"\n",
"# Define a lambda function for sorting in descending order by amount\n",
"sort_descending = lambda x: x[0]\n",
"\n",
"# Sort the debits list in descending order by amount\n",
"debits_sorted = sorted(debits, key=sort_descending, reverse=True)\n",
"\n",
"debits_sorted\n",
"\n"
]
},
{
Expand Down Expand Up @@ -158,7 +202,7 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 4,
"id": "e1de9d03-f029-4e2e-9733-ae92e3de7527",
"metadata": {},
"outputs": [],
Expand All @@ -169,12 +213,25 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 5,
"id": "2f253b7e-5300-4819-b38f-9fc090554f51",
"metadata": {},
"outputs": [],
"outputs": [
{
"data": {
"text/plain": [
"[105.0, 52.5, -26.25, 1050.0, -10.5]"
]
},
"execution_count": 5,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"# your code goes here"
"# Calculate new balances after adding 5% interest\n",
"balances_with_interest = list(map(lambda x: x * 1.05, balances))\n",
"balances_with_interest\n"
]
},
{
Expand All @@ -195,7 +252,7 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 6,
"id": "69e24c3b-385e-44d6-a8ed-705a3f58e696",
"metadata": {},
"outputs": [],
Expand All @@ -209,12 +266,29 @@
},
{
"cell_type": "code",
"execution_count": null,
"id": "0906a9b0-d567-4786-96f2-5755611b885e",
"execution_count": 7,
"id": "2a3b2447",
"metadata": {},
"outputs": [],
"outputs": [
{
"data": {
"text/plain": [
"[{'balance': 1020.0, 'interest_rate': 0.02},\n",
" {'balance': 2020.0, 'interest_rate': 0.01},\n",
" {'balance': 515.0, 'interest_rate': 0.03}]"
]
},
"execution_count": 7,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"# your code goes here\n"
"# Calculate new balances after adding interest for each account\n",
"accounts_with_interest = list(\n",
" map(lambda acc: {'balance': acc['balance'] * (1 + acc['interest_rate']), 'interest_rate': acc['interest_rate']}, accounts)\n",
")\n",
"accounts_with_interest"
]
},
{
Expand Down Expand Up @@ -243,14 +317,28 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 8,
"id": "6284dbd3-e117-411e-8087-352be6deaed4",
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"-36.75\n"
]
}
],
"source": [
"from functools import reduce\n",
"\n",
"# your code goes here"
"# Filter negative balances\n",
"negative_balances = list(filter(lambda x: x < 0, balances_with_interest))\n",
"\n",
"# Sum the negative balances using reduce\n",
"total_negative = reduce(lambda a, b: a + b, negative_balances, 0)\n",
"\n",
"print(total_negative)"
]
},
{
Expand All @@ -273,24 +361,39 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 9,
"id": "da2264b5-298e-4b45-99df-852b94e90d15",
"metadata": {},
"outputs": [],
"outputs": [
{
"data": {
"text/plain": [
"[650, 1600, 275]"
]
},
"execution_count": 9,
"metadata": {},
"output_type": "execute_result"
}
],
"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",
" return account['balance'] - sum(account.get('withdrawals', []))\n",
"\n",
"remaining_balances = list(map(calculate_balance, accounts))\n",
"remaining_balances\n"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
Expand All @@ -304,7 +407,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.9.6"
}
},
"nbformat": 4,
Expand Down