lesson2 - Assignment: Data Structures and File Handling

assignment2/assignment2.py

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+import csv
+import traceback
+import os
+from datetime import datetime
+import custom_module
+
+# ===== TASK 2: READ EMPLOYEES =====
+print("\n=== TASK 2: ===")
+def read_employees():
+    employees = {"fields": [], "rows": []}
+    try:
+        with open('../csv/employees.csv', 'r') as file:
+            reader = csv.reader(file)
+            employees["fields"] = next(reader)
+            employees["rows"] = [row for row in reader]
+        return employees
+    except Exception as e:
+        traceback.print_exc()
+        exit(1)
+
+employees = read_employees()
+print(f"Employees Data: {employees}")
+
+# ===== TASK 3: COLUMN INDEX =====
+print("\n=== TASK 3: ===")
+def column_index(column_name):
+    return employees["fields"].index(column_name)
+
+employee_id_column = column_index("employee_id")
+print(f"Employee ID Column Index: {employee_id_column}")
+
+# ===== TASK 4: FIRST NAME =====
+print("\n=== TASK 4: ===")
+def first_name(row_num):
+    return employees["rows"][row_num][column_index("first_name")]
+
+print(f"First name of employee 0: {first_name(0)}")
+
+# ===== TASK 5: FIND EMPLOYEE =====
+print("\n=== TASK 5: ===")
+def employee_find(employee_id):
+    def employee_match(row):
+        return row[employee_id_column] == str(employee_id)
+    return list(filter(employee_match, employees["rows"]))
+
+employee_found = employee_find(1)
+print(f"Employee found with ID 1: {employee_found}")
+
+# ===== TASK 6: FIND EMPLOYEE WITH LAMBDA =====
+print("\n=== TASK 6: ===")
+def employee_find_2(employee_id):
+    return list(filter(lambda row: row[employee_id_column] == str(employee_id), employees["rows"]))
+
+employee_found_2 = employee_find_2(1)
+print(f"Employee found with ID 1 (Lambda): {employee_found_2}")
+
+# ===== TASK 7: SORT BY LAST NAME =====
+print("\n=== TASK 7: ===")
+def sort_by_last_name():
+    last_name_col = column_index("last_name")
+    employees["rows"].sort(key=lambda row: row[last_name_col])
+    return employees["rows"]
+
+sorted_by_last_name = sort_by_last_name()
+print(f"Employees Sorted by Last Name: {sorted_by_last_name}")
+
+# ===== TASK 8: EMPLOYEE DICT =====
+print("\n=== TASK 8: ===")
+def employee_dict(row):
+    return {
+        employees["fields"][i]: row[i]
+        for i in range(len(row))
+        if employees["fields"][i] != "employee_id"
+    }
+
+employee_dict_result = employee_dict(employees["rows"][0])
+print(f"Employee Dict for First Employee: {employee_dict_result}")
+
+# ===== TASK 9: ALL EMPLOYEES DICT =====
+print("\n=== TASK 9: ===")
+def all_employees_dict():
+    return {
+        row[employee_id_column]: employee_dict(row)
+        for row in employees["rows"]
+    }
+
+all_employees = all_employees_dict()
+print(f"All Employees as Dict: {all_employees}")
+
+# ===== TASK 10: OS MODULE =====
+print("\n=== TASK 10: ===")
+def get_this_value():
+    return os.getenv('THISVALUE', None)
+
+this_value = get_this_value()
+print(f"Value of THISVALUE environment variable: {this_value}")
+
+# ===== TASK 11: CUSTOM MODULE =====
+print("\n=== TASK 11: ===")
+def set_that_secret(new_secret):
+    custom_module.set_secret(new_secret)
+
+# (Assuming you need to set a secret; this would print confirmation if the module is used correctly)
+set_that_secret("new_secret_123")
+print("Secret set through custom_module.")
+
+# ===== TASK 12: READ MINUTES =====
+print("\n=== TASK 12: ===")
+def read_minutes():
+    def read_file(filename):
+        data = {"fields": [], "rows": []}
+        with open(filename, 'r') as file:
+            reader = csv.reader(file)
+            data["fields"] = next(reader)
+            data["rows"] = [tuple(row) for row in reader]
+        return data
+
+    minutes1 = read_file('minutes.csv')
+    minutes2 = {"fields": minutes1["fields"], "rows": minutes1["rows"][:10]}  # First 10 rows as sample
+    return minutes1, minutes2
+
+minutes1, minutes2 = read_minutes()
+print(f"Minutes Data (Full): {minutes1}")
+print(f"Minutes Data (Sample, first 10 rows): {minutes2}")
+
+# ===== TASK 13: CREATE MINUTES SET =====
+print("\n=== TASK 13: ===")
+def create_minutes_set():
+    return set(minutes1["rows"]).union(set(minutes2["rows"]))
+
+minutes_set = create_minutes_set()
+print(f"Minutes Set (Union of both): {minutes_set}")
+
+# ===== TASK 14: CONVERT TO DATETIME =====
+print("\n=== TASK 14: ===")
+def create_minutes_list():
+    return [
+        (row[0], datetime.strptime(row[1], "%B %d, %Y"))
+        for row in minutes_set
+    ]
+
+minutes_list = create_minutes_list()
+print(f"Minutes List with Dates: {minutes_list}")
+
+# ===== TASK 15: WRITE SORTED LIST =====
+print("\n=== TASK 15: ===")
+def write_sorted_list():
+    minutes_list.sort(key=lambda x: x[1])
+    with open('minutes.csv', 'w', newline='') as file:
+        writer = csv.writer(file)
+        writer.writerow(["Name", "Date"])
+        writer.writerows(
+            (name, date.strftime("%B %d, %Y"))
+            for name, date in minutes_list
+        )
+    return [
+        (name, date.strftime("%B %d, %Y"))
+        for name, date in minutes_list
+    ]
+
+sorted_minutes = write_sorted_list()
+print(f"Sorted Minutes List: {sorted_minutes}")

assignment2/csv/employees.csv

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+employee_id,first_name,last_name,department,position,salary
+1,Jason,Tucker,Sales,Manager,50000
+2,Austin,Hester,Engineering,Developer,60000
+3,Daniel,Jackson,HR,Coordinator,45000
+4,Samantha,Johnson,Marketing,Assistant,40000
+5,Joseph,Harris,HR,Manager,55000
+6,Samantha,Johnson,Sales,Executive,47000
+7,Gina,Maldonado,Engineering,Developer,62000
+8,Samantha,Johnson,Marketing,Manager,52000
+9,Yesenia,Smith,Sales,Assistant,43000
+10,Lori,Martin,Engineering,Developer,60000
+11,Jonathan,Parrish,HR,Coordinator,47000
+12,Samantha,Johnson,Marketing,Assistant,40000
+13,Amanda,Brown,Sales,Manager,52000
+14,Sarah,Murray,HR,Assistant,43000
+15,Samantha,Johnson,Engineering,Developer,62000
+16,Austin,Hester,Marketing,Assistant,45000
+17,Jonathan,Parrish,Sales,Executive,55000
+18,Yesenia,Smith,Engineering,Manager,65000
+19,Daniel,Jackson,HR,Coordinator,46000
+20,Gina,Maldonado,Sales,Executive,50000
+21,Kimberly,Stewart,Engineering,Manager,65000
+22,Samantha,Johnson,Sales,Manager,53000
+23,Sarah,Murray,HR,Assistant,43000
+24,Aaron,Kaufman,Engineering,Developer,60000
+25,Tony,Henderson,Sales,Executive,48000
+26,Sarah,Murray,HR,Manager,54000
+27,Austin,Hester,Marketing,Coordinator,48000
+28,Joseph,Harris,HR,Executive,50000
+29,Gina,Maldonado,Sales,Manager,52000
+30,Aaron,Kaufman,Marketing,Manager,60000
+31,Daniel,Jackson,HR,Executive,48000
+32,Aaron,Kaufman,Sales,Manager,53000
+33,Aaron,Kaufman,HR,Manager,55000
+34,Tony,Henderson,Marketing,Coordinator,47000
+35,Yesenia,Smith,HR,Assistant,42000
+36,Joseph,Harris,Engineering,Coordinator,48000
+37,Jason,Tucker,Sales,Manager,49000
+38,Matthew,Russell,Marketing,Assistant,45000
+39,Lori,Martin,HR,Coordinator,46000
+40,Samantha,Johnson,Sales,Executive,51000
+41,Tony,Henderson,HR,Assistant,44000
+42,Gina,Maldonado,Sales,Manager,55000
+43,Sarah,Murray,HR,Coordinator,49000
+44,Gina,Maldonado,Sales,Executive,53000
+45,Austin,Hester,HR,Assistant,45000
+46,Samantha,Johnson,Sales,Executive,52000

assignment2/custom_module.py

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+# Task 11 
+    #1.	Create custom_module.py:
+secret = "shazam!"  # Initial value
+
+def set_secret(new_secret):
+    """Updates the secret variable globally."""
+    global secret  
+    secret = new_secret
+
+

assignment2/diary.py

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+# Task 1: Diary
+import traceback
+
+try:
+    with open('diary.txt', 'a') as file:
+        first_prompt = True
+        while True:
+            if first_prompt:
+                entry = input("What happened today? ")
+                first_prompt = False
+            else:
+                entry = input("What else? ")
+
+            file.write(entry + "\n")
+
+            if entry.lower() == "done for now":
+                break
+except Exception as e:
+    trace_back = traceback.extract_tb(e.__traceback__)
+    stack_trace = list()
+    for trace in trace_back:
+        stack_trace.append(f'File : {trace[0]} , Line : {trace[1]}, Func.Name : {trace[2]}, Message : {trace[3]}')
+    print(f"Exception type: {type(e).__name__}")
+    message = str(e)
+    if message:
+        print(f"Exception message: {message}")
+    print(f"Stack trace: {stack_trace}")

assignment2/diary.txt

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+went to gym 
+eat
+grocery 
+
+done for now 
+done for now 
+
+wnet to gym 
+went  to eat 
+grocery 
+done  for now 
+done for now 
+
+went yo gym 
+eat
+done for now 
+done for now 
+done fornow
+
+went to GYM 
+eat 
+Grocery 
+done for now 
+done for now 
+

assignment2/minutes.csv

@@ -1,46 +1,46 @@
 Name,Date
 Jason Tucker,"September 20, 1980"
-Austin Hester,"March 8, 1981"
-Daniel Jackson,"October 2, 1981"
+Austin Hester,"March 08, 1981"
+Daniel Jackson,"October 02, 1981"
 Mrs. Samantha Johnson,"December 17, 1981"
-Joseph Harris,"March 3, 1982"
+Joseph Harris,"March 03, 1982"
 Mrs. Samantha Johnson,"March 12, 1982"
 Gina Maldonado,"December 16, 1982"
 Mrs. Samantha Johnson,"December 23, 1982"
 Yesenia Smith,"August 10, 1983"
-Lori Martin,"February 5, 1984"
+Lori Martin,"February 05, 1984"
 Jonathan Parrish,"June 12, 1984"
 Mrs. Samantha Johnson,"July 20, 1984"
-Amanda Brown,"August 8, 1984"
+Amanda Brown,"August 08, 1984"
 Sarah Murray,"October 30, 1984"
 Mrs. Samantha Johnson,"November 28, 1984"
-Austin Hester,"June 4, 1985"
+Austin Hester,"June 04, 1985"
 Jonathan Parrish,"March 18, 1986"
-Yesenia Smith,"May 6, 1986"
+Yesenia Smith,"May 06, 1986"
 Daniel Jackson,"December 13, 1986"
 Gina Maldonado,"February 13, 1987"
 Kimberly Stewart,"December 12, 1987"
 Mrs. Samantha Johnson,"July 10, 1988"
 Sarah Murray,"August 16, 1988"
 Aaron Kaufman,"October 24, 1988"
-Tony Henderson,"November 7, 1988"
+Tony Henderson,"November 07, 1988"
 Sarah Murray,"November 19, 1988"
 Austin Hester,"January 18, 1989"
-Joseph Harris,"March 1, 1989"
-Gina Maldonado,"April 7, 1989"
+Joseph Harris,"March 01, 1989"
+Gina Maldonado,"April 07, 1989"
 Aaron Kaufman,"November 14, 1989"
-Daniel Jackson,"April 8, 1990"
-Aaron Kaufman,"May 1, 1990"
+Daniel Jackson,"April 08, 1990"
+Aaron Kaufman,"May 01, 1990"
 Aaron Kaufman,"July 21, 1990"
-Tony Henderson,"October 4, 1990"
+Tony Henderson,"October 04, 1990"
 Yesenia Smith,"November 23, 1990"
-Joseph Harris,"April 3, 1991"
+Joseph Harris,"April 03, 1991"
 Jason Tucker,"April 30, 1991"
 Matthew Russell,"May 31, 1991"
-Lori Martin,"July 8, 1991"
+Lori Martin,"July 08, 1991"
 Mrs. Samantha Johnson,"July 23, 1991"
 Tony Henderson,"November 15, 1991"
-Gina Maldonado,"February 9, 1992"
+Gina Maldonado,"February 09, 1992"
 Sarah Murray,"June 27, 1992"
 Gina Maldonado,"October 31, 1992"
 Austin Hester,"December 10, 1992"

assignment2/sorted_minutes.csv

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+Name,Date
+Jason Tucker,"September 20, 1980"
+Austin Hester,"March 08, 1981"
+Daniel Jackson,"October 02, 1981"
+Mrs. Samantha Johnson,"December 17, 1981"
+Joseph Harris,"March 03, 1982"
+Mrs. Samantha Johnson,"March 12, 1982"
+Gina Maldonado,"December 16, 1982"
+Mrs. Samantha Johnson,"December 23, 1982"
+Yesenia Smith,"August 10, 1983"
+Lori Martin,"February 05, 1984"
+Jonathan Parrish,"June 12, 1984"
+Mrs. Samantha Johnson,"July 20, 1984"
+Amanda Brown,"August 08, 1984"
+Sarah Murray,"October 30, 1984"
+Mrs. Samantha Johnson,"November 28, 1984"
+Austin Hester,"June 04, 1985"
+Jonathan Parrish,"March 18, 1986"
+Yesenia Smith,"May 06, 1986"
+Daniel Jackson,"December 13, 1986"
+Gina Maldonado,"February 13, 1987"
+Kimberly Stewart,"December 12, 1987"
+Mrs. Samantha Johnson,"July 10, 1988"
+Sarah Murray,"August 16, 1988"
+Aaron Kaufman,"October 24, 1988"
+Tony Henderson,"November 07, 1988"
+Sarah Murray,"November 19, 1988"
+Austin Hester,"January 18, 1989"
+Joseph Harris,"March 01, 1989"
+Gina Maldonado,"April 07, 1989"
+Aaron Kaufman,"November 14, 1989"
+Daniel Jackson,"April 08, 1990"
+Aaron Kaufman,"May 01, 1990"
+Aaron Kaufman,"July 21, 1990"
+Tony Henderson,"October 04, 1990"
+Yesenia Smith,"November 23, 1990"
+Joseph Harris,"April 03, 1991"
+Jason Tucker,"April 30, 1991"
+Matthew Russell,"May 31, 1991"
+Lori Martin,"July 08, 1991"
+Mrs. Samantha Johnson,"July 23, 1991"
+Tony Henderson,"November 15, 1991"
+Gina Maldonado,"February 09, 1992"
+Sarah Murray,"June 27, 1992"
+Gina Maldonado,"October 31, 1992"
+Austin Hester,"December 10, 1992"
+Mrs. Samantha Johnson,"December 12, 1992"