Home Loan Calculator Example

examples/home_loan_calc.py

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+"""
+This is the
+"""
+import csv
+import zipfile
+from gooey import Gooey, GooeyParser
+
+import os
+from io import TextIOWrapper
+
+path = os.path.join(os.path.dirname(__file__), 'sample_data', 'worldcities.zip')
+
+with zipfile.ZipFile(path) as zf:
+    with zf.open('worldcities.csv', 'r') as f:
+        reader = csv.reader(TextIOWrapper(f, 'utf-8'))
+        locations = ['{} - {}'.format(x[4], x[1]) for x in reader][1:][:1000]
+
+
+@Gooey(program_name='Home Loan Calculator')
+def loan_calculator():
+    parser = GooeyParser(
+        description='Welcome to the Home Loan EMI Calculator . Calculate anytime, anywhere !')
+
+    calculator = parser.add_argument_group('Calculate Your EMI on Home Loan', gooey_options={
+        'show_border': True
+    })
+
+    calculator.add_argument(
+        'loan_amount',
+        metavar='Loan Amount',
+        help='Loan Amount',
+        gooey_options={'show_help': False, 'label_color': '#2e2424'})
+    calculator.add_argument(
+        'tenure',
+        metavar='Tenure(Years)',
+        help='Tenure(Years)',
+        gooey_options={'show_help': False, 'label_color': '#2e2424'})
+    calculator.add_argument(
+        'interest_rate',
+        metavar='Interest Rate (% P.A.)',
+        help='Interest Rate (% P.A.)',
+        gooey_options={'show_help': False, 'label_color': '#2e2424'})
+
+    args = parser.parse_args()
+    print(args)
+    print('Loan Amount :', args.loan_amount);
+    print('Tenure(Years) :', args.tenure);
+    print('Interest Rate (% P.A.) :', args.interest_rate);
+    #rate_of_int = Annual Rate of interest/12/100
+    interest_rate = float(args.interest_rate)
+    rate_of_int = (interest_rate / 12) / 100
+    loan_amount = float(args.loan_amount)
+    tenure = int(args.tenure)
+    #EMI = P x R x (1+R)^N / [(1+R)^N-1]
+    # P = Principal loan amount = 10,00,000
+    # R = Monthly interest rate = 7.2/12/100 = 0.006
+    # N = Loan tenure in months = 10 Y = 120 Months
+    #i.e ₹10,00,000 * 0.006 * (1 + 0.006)120 / ((1 + 0.006)120 - 1)
+    #P = 1000000  # Principal amount
+    #R = 0.006  # Interest rate
+    #N = 120    # Number of periods
+    #result = P * R * ((1+R)**N) / (((1+R)**N) - 1)
+    emi = loan_amount * rate_of_int * ((1 +rate_of_int)**tenure) / (((1+rate_of_int)**tenure) - 1)
+    print ('EMI : ', float(emi))
+    # ... rest of program
+
+
+
+if __name__ == '__main__':
+    loan_calculator()