From d43dd71bc7e3b9822501717510e8f0f6e4a77e9d Mon Sep 17 00:00:00 2001
From: lolPirate <debamalyadawn21@gmail.com>
Date: Fri, 29 May 2020 23:23:13 +0530
Subject: [PATCH 01/12] completed exercise 1.5

---
 Work/bounce.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Work/bounce.py b/Work/bounce.py
index 3660ddd82..6da1b5144 100644
--- a/Work/bounce.py
+++ b/Work/bounce.py
@@ -1,3 +1,9 @@
 # bounce.py
 #
 # Exercise 1.5
+
+height = 100 #meters
+
+for i in range(1,11):
+    height = (3/5) * height
+    print (f'{i} {round(height, 4)}')
\ No newline at end of file

From 84548562cb9ca790e3b1b5afa9bee8fb9d1b1bae Mon Sep 17 00:00:00 2001
From: lolPirate <debamalyadawn21@gmail.com>
Date: Fri, 29 May 2020 23:23:48 +0530
Subject: [PATCH 02/12] completed exercise 1.5

---
 Work/bounce.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Work/bounce.py b/Work/bounce.py
index 6da1b5144..b3dd54853 100644
--- a/Work/bounce.py
+++ b/Work/bounce.py
@@ -2,8 +2,8 @@
 #
 # Exercise 1.5
 
-height = 100 #meters
+height = 100  # meters
 
-for i in range(1,11):
+for i in range(1, 11):
     height = (3/5) * height
-    print (f'{i} {round(height, 4)}')
\ No newline at end of file
+    print(f'{i} {round(height, 4)}')

From e13f8530a2ddffbe3f2ad8d94419b868aa51ec54 Mon Sep 17 00:00:00 2001
From: lolPirate <debamalyadawn21@gmail.com>
Date: Sat, 30 May 2020 00:11:36 +0530
Subject: [PATCH 03/12] completed exercise 1.11

---
 Work/mortgage.py | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/Work/mortgage.py b/Work/mortgage.py
index d527314e3..14deabb96 100644
--- a/Work/mortgage.py
+++ b/Work/mortgage.py
@@ -1,3 +1,25 @@
 # mortgage.py
 #
 # Exercise 1.7
+principal = 500000.0
+rate = 0.05
+payment = 2684.11
+total_paid = 0.0
+months = 0
+extra_payment_start_month = 60
+extra_payment_end_month = 108
+extra_payment = 1000
+
+while principal > 0:
+    months += 1
+    interest = principal * (1+rate/12)
+    if interest < payment:
+        payment = interest
+    principal = interest - payment
+    total_paid = total_paid + payment
+    if extra_payment_start_month <= months <= extra_payment_end_month:
+        principal = principal - extra_payment
+        total_paid = total_paid + extra_payment
+    print(f'{months}\t{round(total_paid, 2)}\t{round(principal, 2)}')
+
+print(f'{round(total_paid, 2)} over {months} months')

From 9b96c879ee197ce99c4a444d4bec9baf9b530f3f Mon Sep 17 00:00:00 2001
From: lolPirate <debamalyadawn21@gmail.com>
Date: Sat, 30 May 2020 00:37:52 +0530
Subject: [PATCH 04/12] completed exercise 1.17

---
 Work/mortgage.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Work/mortgage.py b/Work/mortgage.py
index 14deabb96..e4cdf34b1 100644
--- a/Work/mortgage.py
+++ b/Work/mortgage.py
@@ -20,6 +20,6 @@
     if extra_payment_start_month <= months <= extra_payment_end_month:
         principal = principal - extra_payment
         total_paid = total_paid + extra_payment
-    print(f'{months}\t{round(total_paid, 2)}\t{round(principal, 2)}')
+    print(f'{months}\t{total_paid:0.2f}\t{principal:10.2f}')
 
-print(f'{round(total_paid, 2)} over {months} months')
+print(f'{total_paid:0.2f} over {months} months')

From 0aaddcaff8e4005e038c61bb78ceb46bbab481c0 Mon Sep 17 00:00:00 2001
From: lolPirate <debamalyadawn21@gmail.com>
Date: Sat, 30 May 2020 01:39:08 +0530
Subject: [PATCH 05/12] completed exercise 1.27

---
 Work/pcost.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Work/pcost.py b/Work/pcost.py
index e68aa20b4..054aad6f5 100644
--- a/Work/pcost.py
+++ b/Work/pcost.py
@@ -1,3 +1,15 @@
 # pcost.py
 #
 # Exercise 1.27
+
+file = r'Work\Data\portfolio.csv'
+
+total_cost = 0.0
+
+with open(file, 'rt') as f:
+    next(f)
+    for line in f:
+        name, shares, price = line.strip().split(',')
+        total_cost = total_cost + int(shares) * float(price)
+
+print(f'Total cost {total_cost:0.2f}')

From 7c7c5563bcb07d43e7f77166dbb8af4684a5004e Mon Sep 17 00:00:00 2001
From: lolPirate <debamalyadawn21@gmail.com>
Date: Sat, 30 May 2020 01:48:35 +0530
Subject: [PATCH 06/12] completed exercise 1.30

---
 Work/pcost.py | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/Work/pcost.py b/Work/pcost.py
index 054aad6f5..64b5ba9ce 100644
--- a/Work/pcost.py
+++ b/Work/pcost.py
@@ -2,14 +2,19 @@
 #
 # Exercise 1.27
 
-file = r'Work\Data\portfolio.csv'
-
-total_cost = 0.0
-
-with open(file, 'rt') as f:
-    next(f)
-    for line in f:
-        name, shares, price = line.strip().split(',')
-        total_cost = total_cost + int(shares) * float(price)
+def portfolio_cost(file_name):
+    """
+    Returns the total cost to buy all shares.
+    """
+    total_cost = 0.0
+    with open(file_name, 'rt') as f:
+        next(f)
+        for line in f:
+            _, shares, price = line.strip().split(',')
+            total_cost = total_cost + int(shares) * float(price)
+    return total_cost
 
+file = r'Work\Data\portfolio.csv'
+total_cost = portfolio_cost(file)
 print(f'Total cost {total_cost:0.2f}')
+

From cc41577bc94377f6b36bc7669c4fb9d792f0c4c5 Mon Sep 17 00:00:00 2001
From: lolPirate <debamalyadawn21@gmail.com>
Date: Sat, 30 May 2020 02:01:37 +0530
Subject: [PATCH 07/12] completed exercise 1.33

---
 Work/pcost.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/Work/pcost.py b/Work/pcost.py
index 64b5ba9ce..3feec6e53 100644
--- a/Work/pcost.py
+++ b/Work/pcost.py
@@ -1,6 +1,7 @@
 # pcost.py
 #
 # Exercise 1.27
+import sys
 
 def portfolio_cost(file_name):
     """
@@ -14,7 +15,12 @@ def portfolio_cost(file_name):
             total_cost = total_cost + int(shares) * float(price)
     return total_cost
 
-file = r'Work\Data\portfolio.csv'
+
+if len(sys.argv) == 2:
+    file = sys.argv[1]
+else:
+    file = r'Work\Data\portfolio.csv'
+
 total_cost = portfolio_cost(file)
 print(f'Total cost {total_cost:0.2f}')
 

From 52e2d1f1be250d7a24b4fad5a1cb907a53b20124 Mon Sep 17 00:00:00 2001
From: lolPirate <debamalyadawn21@gmail.com>
Date: Sat, 30 May 2020 02:59:20 +0530
Subject: [PATCH 08/12] completed exercise 2.7

---
 Work/report.py | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

diff --git a/Work/report.py b/Work/report.py
index 47d5da7b1..6cfacdf80 100644
--- a/Work/report.py
+++ b/Work/report.py
@@ -1,3 +1,50 @@
 # report.py
 #
 # Exercise 2.4
+import csv
+from pprint import pprint
+
+def read_portfolio(file_name):
+    """
+    Opens portfolio file, reads it and returns a list.
+    """
+    portfolio = []
+    with open(file_name, 'rt') as f:
+        f = csv.reader(f)
+        next(f)
+        for line in f:
+            name, shares, price = line
+            portfolio.append(
+                {
+                    'name': name,
+                    'shares': int(shares),
+                    'price': float(price),
+                }
+            )
+    return portfolio
+
+def read_prices(file_name):
+    """
+    Reads prices from a csv file and returns a dictionary
+    """
+    prices = {}
+    with open(file_name, 'rt') as f:
+        f = csv.reader(f)
+        for line in f:
+            if line:
+                prices[line[0]] = float(line[1])
+    return prices
+
+portfolio = read_portfolio(r'Work\Data\portfolio.csv')
+current_prices = read_prices(r'Work\Data\prices.csv')
+
+portfolio_price = 0.0
+current_price = 0.0
+
+for i in portfolio:
+    portfolio_price += i['shares'] * i['price']
+    current_price += i['shares'] * current_prices[i['name']]
+
+print(f'Original Value : {portfolio_price:0.2f}')
+print(f'Current Value : {current_price:0.2f}')
+print(f'Gain/Loss : {(current_price - portfolio_price)*100/portfolio_price:0.2f}%')
\ No newline at end of file

From 52f53c929a1878d74a535be956c487bbd51006f3 Mon Sep 17 00:00:00 2001
From: lolPirate <debamalyadawn21@gmail.com>
Date: Sat, 30 May 2020 02:59:59 +0530
Subject: [PATCH 09/12] completed exercise 2.7

---
 Work/report.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Work/report.py b/Work/report.py
index 6cfacdf80..993ccb2cf 100644
--- a/Work/report.py
+++ b/Work/report.py
@@ -4,6 +4,7 @@
 import csv
 from pprint import pprint
 
+
 def read_portfolio(file_name):
     """
     Opens portfolio file, reads it and returns a list.
@@ -23,6 +24,7 @@ def read_portfolio(file_name):
             )
     return portfolio
 
+
 def read_prices(file_name):
     """
     Reads prices from a csv file and returns a dictionary
@@ -35,6 +37,7 @@ def read_prices(file_name):
                 prices[line[0]] = float(line[1])
     return prices
 
+
 portfolio = read_portfolio(r'Work\Data\portfolio.csv')
 current_prices = read_prices(r'Work\Data\prices.csv')
 
@@ -47,4 +50,5 @@ def read_prices(file_name):
 
 print(f'Original Value : {portfolio_price:0.2f}')
 print(f'Current Value : {current_price:0.2f}')
-print(f'Gain/Loss : {(current_price - portfolio_price)*100/portfolio_price:0.2f}%')
\ No newline at end of file
+print(
+    f'Gain/Loss : {(current_price - portfolio_price)*100/portfolio_price:0.2f}%')

From d681f0708a3db1bb23ccd50ec3c0854936d8d80f Mon Sep 17 00:00:00 2001
From: lolPirate <debamalyadawn21@gmail.com>
Date: Sat, 30 May 2020 03:47:00 +0530
Subject: [PATCH 10/12] completed exercise 2.12

---
 Work/report.py | 55 ++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 44 insertions(+), 11 deletions(-)

diff --git a/Work/report.py b/Work/report.py
index 993ccb2cf..1f1730d7b 100644
--- a/Work/report.py
+++ b/Work/report.py
@@ -38,17 +38,50 @@ def read_prices(file_name):
     return prices
 
 
-portfolio = read_portfolio(r'Work\Data\portfolio.csv')
-current_prices = read_prices(r'Work\Data\prices.csv')
+def make_report(portfolio, current_prices):
+    """
+    Makes a report from the supplied portfolio and current_prices
+    """
+    report = []
+    for i in portfolio:
+        name, shares, price = i.values()
+        current_price = current_prices[name]
+        change = current_price - price
+        report.append((name, shares, current_price, change))
+    return report
+
+
+def retire(portfolio, current_prices):
+    portfolio_price = 0.0
+    current_price = 0.0
+
+    for i in portfolio:
+        portfolio_price += i['shares'] * i['price']
+        current_price += i['shares'] * current_prices[i['name']]
+
+    print(f'Original Value : {portfolio_price:0.2f}')
+    print(f'Current Value : {current_price:0.2f}')
+    print(
+        f'Gain/Loss : {(current_price - portfolio_price)*100/portfolio_price:0.2f}%')
+
+
+def print_report():
+    portfolio = read_portfolio(r'Work\Data\portfolio.csv')
+    current_prices = read_prices(r'Work\Data\prices.csv')
+
+    report = make_report(portfolio, current_prices)
+
+    headers = ('Name', 'Shares', 'Price', 'Change')
+    print(
+        f'{headers[0]:>10s} {headers[1]:>10s} {headers[2]:>10s} {headers[3]:>10s}')
+
+    seperators = '-'*10
+    print(f'{seperators} {seperators} {seperators} {seperators}')
 
-portfolio_price = 0.0
-current_price = 0.0
+    for name, shares, current_price, change in report:
+        current_price = round(current_price, 2)
+        current_price = '$'+str(current_price)
+        print(f'{name:>10s} {shares:>10n} {current_price:>10s} {change:>10.2f}')
 
-for i in portfolio:
-    portfolio_price += i['shares'] * i['price']
-    current_price += i['shares'] * current_prices[i['name']]
 
-print(f'Original Value : {portfolio_price:0.2f}')
-print(f'Current Value : {current_price:0.2f}')
-print(
-    f'Gain/Loss : {(current_price - portfolio_price)*100/portfolio_price:0.2f}%')
+print_report()

From 09925c32aa489b9d8da76f86d9a66dc4601ef5ef Mon Sep 17 00:00:00 2001
From: lolPirate <debamalyadawn21@gmail.com>
Date: Sat, 30 May 2020 20:09:04 +0530
Subject: [PATCH 11/12] completed exercise 2.16

---
 Work/pcost.py  | 16 +++++++++++-----
 Work/report.py | 10 +++++-----
 2 files changed, 16 insertions(+), 10 deletions(-)

diff --git a/Work/pcost.py b/Work/pcost.py
index 3feec6e53..0b1cc75fa 100644
--- a/Work/pcost.py
+++ b/Work/pcost.py
@@ -2,6 +2,7 @@
 #
 # Exercise 1.27
 import sys
+import csv
 
 def portfolio_cost(file_name):
     """
@@ -9,10 +10,16 @@ def portfolio_cost(file_name):
     """
     total_cost = 0.0
     with open(file_name, 'rt') as f:
-        next(f)
-        for line in f:
-            _, shares, price = line.strip().split(',')
-            total_cost = total_cost + int(shares) * float(price)
+        f = csv.reader(f)
+        headers = next(f)
+        for indx, line in enumerate(f, start=1):
+            record = dict(zip(headers, line))
+            try:
+                shares = int(record['shares'])
+                price = float(record['price'])
+                total_cost = total_cost + shares * price
+            except ValueError:
+                print(f'Row {indx}: Bad Row: {line}')
     return total_cost
 
 
@@ -23,4 +30,3 @@ def portfolio_cost(file_name):
 
 total_cost = portfolio_cost(file)
 print(f'Total cost {total_cost:0.2f}')
-
diff --git a/Work/report.py b/Work/report.py
index 1f1730d7b..6acc21b61 100644
--- a/Work/report.py
+++ b/Work/report.py
@@ -12,14 +12,14 @@ def read_portfolio(file_name):
     portfolio = []
     with open(file_name, 'rt') as f:
         f = csv.reader(f)
-        next(f)
+        headers = next(f)
         for line in f:
-            name, shares, price = line
+            record = dict(zip(headers, line))
             portfolio.append(
                 {
-                    'name': name,
-                    'shares': int(shares),
-                    'price': float(price),
+                    'name': record['name'],
+                    'shares': int(record['shares']),
+                    'price': float(record['price']),
                 }
             )
     return portfolio

From 75c6bbcc04560dbf02ba74ff631f5b61f424dfa3 Mon Sep 17 00:00:00 2001
From: lolPirate <debamalyadawn21@gmail.com>
Date: Sat, 30 May 2020 22:49:17 +0530
Subject: [PATCH 12/12] completed exercise 3.2

---
 Work/report.py | 24 ++++++++++++++++++------
 1 file changed, 18 insertions(+), 6 deletions(-)

diff --git a/Work/report.py b/Work/report.py
index 6acc21b61..a71b95697 100644
--- a/Work/report.py
+++ b/Work/report.py
@@ -65,11 +65,7 @@ def retire(portfolio, current_prices):
         f'Gain/Loss : {(current_price - portfolio_price)*100/portfolio_price:0.2f}%')
 
 
-def print_report():
-    portfolio = read_portfolio(r'Work\Data\portfolio.csv')
-    current_prices = read_prices(r'Work\Data\prices.csv')
-
-    report = make_report(portfolio, current_prices)
+def print_report(report):
 
     headers = ('Name', 'Shares', 'Price', 'Change')
     print(
@@ -84,4 +80,20 @@ def print_report():
         print(f'{name:>10s} {shares:>10n} {current_price:>10s} {change:>10.2f}')
 
 
-print_report()
+def portfolio_report(portfolio, prices):
+    portfolio = read_portfolio(portfolio)
+    prices = read_prices(prices)
+    report = make_report(portfolio, prices)
+    print_report(report)
+
+
+if __name__ == '__main__':
+    portfolio = r'Work\Data\portfolio.csv'
+    prices = r'Work\Data\prices.csv'
+    portfolio_report(portfolio, prices)
+
+files = [r'Work\Data\portfolio.csv', r'Work\Data\portfolio2.csv']
+for f in files:        
+    print(f'{f:-^43s}') 
+    portfolio_report(f, r'Work\Data\prices.csv')
+    print()