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lambda lab to lab-python-lambda-map-reduce-filter.ipynb #111

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144 changes: 121 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 @@ -66,7 +66,7 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 2,
"id": "08463071-9351-4d49-8d29-4fcb817fb177",
"metadata": {},
"outputs": [],
Expand Down Expand Up @@ -94,12 +94,25 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 3,
"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",
"[(-1200, 'debit'), (-100, 'debit'), (-250, 'debit'), (-300, 'debit'), (-850, 'debit')]\n"
]
}
],
"source": [
"# your code goes here"
"credits = [t for t in transactions if t[1] == 'debit']\n",
"print(credits)\n",
"\n",
"debits = list(filter(lambda x: x[1] == 'debit', transactions))\n",
"print(debits) \n"
]
},
{
Expand All @@ -124,12 +137,26 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 5,
"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"
"# Define a lambda function to sort in descending order\n",
"sort_descending = lambda x, y: x[0] > y[0]\n",
"\n",
"# Use the sorted() function with sort_descending and debits\n",
"sorted_debits = sorted(debits, key=lambda x: x[0], reverse=True)\n",
"\n",
"print(sorted_debits)"
]
},
{
Expand Down Expand Up @@ -158,7 +185,7 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 6,
"id": "e1de9d03-f029-4e2e-9733-ae92e3de7527",
"metadata": {},
"outputs": [],
Expand All @@ -169,12 +196,29 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 7,
"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"
"\n",
"# define a function to calculate the balance after one year of interest\n",
"def add_interest(balance):\n",
" interest_rate = 0.05\n",
" return balance + (balance * interest_rate)\n",
"\n",
"# use the map function to apply the add_interest function to the list of balances\n",
"new_balances = list(map(add_interest, balances))\n",
"\n",
"print(new_balances)"
]
},
{
Expand All @@ -195,7 +239,7 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 1,
"id": "69e24c3b-385e-44d6-a8ed-705a3f58e696",
"metadata": {},
"outputs": [],
Expand All @@ -209,12 +253,33 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 2,
"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",
"# define a function to calculate the balance after one year of interest\n",
"def add_interest(account):\n",
" return {'balance': account['balance'] + (account['balance'] * account['interest_rate']), 'interest_rate': account['interest_rate']}\n",
"\n",
"# use the map function to apply the add_interest function to the list of accounts\n",
"new_accounts = list(map(add_interest, accounts))\n",
"\n",
"print(new_accounts)\n"
]
},
{
Expand Down Expand Up @@ -243,14 +308,33 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 3,
"id": "6284dbd3-e117-411e-8087-352be6deaed4",
"metadata": {},
"outputs": [],
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"-33.25\n"
]
}
],
"source": [
"from functools import reduce\n",
"\n",
"# your code goes here"
"\n",
"\n",
"# list of bank account balances after applying an interest_rate of 0.05\n",
"balances = [105.0, 52.5, -23.75, 1050.0, -9.5]\n",
"\n",
"# use filter to get the negative balances\n",
"negative_balances = list(filter(lambda x: x < 0, balances))\n",
"\n",
"# use reduce to calculate the total amount of negative balances\n",
"total_negative = reduce(lambda x, y: x + y, negative_balances)\n",
"\n",
"print(total_negative)"
]
},
{
Expand All @@ -273,24 +357,38 @@
},
{
"cell_type": "code",
"execution_count": null,
"execution_count": 4,
"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",
" return account['balance'] - sum(account['withdrawals'])\n",
"\n",
"remaining_balances = list(map(calculate_balance, accounts))\n",
"\n",
"print(remaining_balances)\n",
"\n"
]
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3 (ipykernel)",
"display_name": "base",
"language": "python",
"name": "python3"
},
Expand All @@ -304,7 +402,7 @@
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.9.13"
"version": "3.13.5"
}
},
"nbformat": 4,
Expand Down