Week 8 Summary — May 18–24, 2026

AWS re/Start Cohort 3: Project CloudIgnite

What We Learned

Python Modules & File Handling (Mon May 18)

Code organization: Functions → Modules → Libraries; import module or from module import function
File handling: open() with modes "r", "w", "a"; always close() or use with open()
JSON module: json.dumps() (Python→JSON), json.loads() (JSON→Python), json.dump()/load() for files
OS module: os.system(), os.listdir(), os.mkdir(), os.getcwd()
PIP: Package manager; pip install, pip list
GitHub & Git Lab: clone, add, commit, push, pull, branches, merge, Personal Access Token

Bioinformatics & SysAdmin Python (Tue–Wed May 19–20)

Lab 118: Reading insulin sequence from NCBI; cleaning text files; string slicing
Lab 120: Counting amino acid occurrences (.count()); molecular weight calculation
Lab 122: Net charge calculation using PKa values and Henderson-Hasselbalch formula
SysAdmin with Python: os.system() (deprecated) vs subprocess.run() (preferred)
Command-line arguments: sys.argv[1] for script arguments
VS Code debugging: Breakpoints, Watch panel for variable inspection

Debugging & Testing (Thu May 21)

Error types: Syntax (easy), Runtime (medium — read traceback), Logical (hard — no crash)
Debugging tools: pdb command-line debugger, VS Code debugger with breakpoints and watchers
Testing levels: Unit → Integration → System → Acceptance (UAT)
Code quality: SOLID, DRY, KISS principles
Lab 130: Debugging Caesar Cipher — Type error, logic error, wrong parameter passed

DevOps & CI/CD (Thu–Fri May 21–22)

DevOps: CALMS framework; uniting development and operations
Methodologies: Waterfall (sequential) vs Agile (sprint-based iterations)
CI/CD: Continuous Integration (auto-test on push) → Continuous Delivery/Deployment
Pipeline: Push → GitHub Action → Tests → Build → Deploy to EC2 → Restart
IaC: Infrastructure as Code (Terraform) — define infrastructure as code
Automation vs Orchestration: Single task vs coordinating multiple tasks
Microservices: Independent services (Netflix example) vs monolithic
CI/CD tools: Jenkins, GitHub Actions, GitLab CI/CD, AWS CodeDeploy
PyLint/PyTest: Code style checking and unit testing frameworks
Semantic versioning: MAJOR.MINOR.PATCH

Python Practice (Sat May 24)

Algorithms: Prime numbers (O(n/2), skip evens, check up to √n)
Palindrome checker: Clean string → reverse with [::-1] → compare
LeetCode Two Sum: Nested loop approach (O(n²))
Nested loops: Right-angled triangle and pyramid pattern printing
Python tips: Ternary operator, map(), zip(), multiple assignment, list slicing, type hints

Key CLF-C02 Connections

AWS Lambda, Cloud9, EC2, CodeCommit, CodeBuild, CodeDeploy, CodePipeline, CloudFormation
DevOps culture, CI/CD pipelines, IaC, microservices (ECS, EKS, Lambda)

Daily Notes

May 18 — Python Modules, File Handlers, JSON, PIP, GitHub & Git Basics
May 19 — Bioinformatics Labs (Insulin Analysis), String Handling, Dictionaries
May 20 — SysAdmin with Python, subprocess, VS Code Debugging
May 21 — Debugging & Testing, Caesar Cipher Debug Lab, DevOps & CI/CD
May 22 — Automation vs Orchestration, Microservices, PyLint/PyTest, Version Control
May 24 — Prime Numbers, Palindrome, LeetCode, Nested Loops, Python Tips

What We Learned

Python Modules & File Handling (Mon May 18)

Code organization: Functions → Modules → Libraries; import module or from module import function

File handling: open() with modes "r", "w", "a"; always close() or use with open()

JSON module: json.dumps() (Python→JSON), json.loads() (JSON→Python), json.dump()/load() for files

OS module: os.system(), os.listdir(), os.mkdir(), os.getcwd()

PIP: Package manager; pip install, pip list

GitHub & Git Lab: clone, add, commit, push, pull, branches, merge, Personal Access Token

Bioinformatics & SysAdmin Python (Tue–Wed May 19–20)

Lab 118: Reading insulin sequence from NCBI; cleaning text files; string slicing

Lab 120: Counting amino acid occurrences (.count()); molecular weight calculation

Lab 122: Net charge calculation using PKa values and Henderson-Hasselbalch formula

SysAdmin with Python: os.system() (deprecated) vs subprocess.run() (preferred)

Command-line arguments: sys.argv[1] for script arguments

VS Code debugging: Breakpoints, Watch panel for variable inspection

Debugging & Testing (Thu May 21)

Error types: Syntax (easy), Runtime (medium — read traceback), Logical (hard — no crash)

Debugging tools: pdb command-line debugger, VS Code debugger with breakpoints and watchers

Testing levels: Unit → Integration → System → Acceptance (UAT)

Code quality: SOLID, DRY, KISS principles

Lab 130: Debugging Caesar Cipher — Type error, logic error, wrong parameter passed

DevOps & CI/CD (Thu–Fri May 21–22)

DevOps: CALMS framework; uniting development and operations

Methodologies: Waterfall (sequential) vs Agile (sprint-based iterations)

CI/CD: Continuous Integration (auto-test on push) → Continuous Delivery/Deployment

Pipeline: Push → GitHub Action → Tests → Build → Deploy to EC2 → Restart

IaC: Infrastructure as Code (Terraform) — define infrastructure as code

Automation vs Orchestration: Single task vs coordinating multiple tasks

Microservices: Independent services (Netflix example) vs monolithic

CI/CD tools: Jenkins, GitHub Actions, GitLab CI/CD, AWS CodeDeploy

PyLint/PyTest: Code style checking and unit testing frameworks

Semantic versioning: MAJOR.MINOR.PATCH

Python Practice (Sat May 24)

Algorithms: Prime numbers (O(n/2), skip evens, check up to √n)

Palindrome checker: Clean string → reverse with [::-1] → compare

LeetCode Two Sum: Nested loop approach (O(n²))

Nested loops: Right-angled triangle and pyramid pattern printing

Python tips: Ternary operator, map(), zip(), multiple assignment, list slicing, type hints

Key CLF-C02 Connections

AWS Lambda, Cloud9, EC2, CodeCommit, CodeBuild, CodeDeploy, CodePipeline, CloudFormation

DevOps culture, CI/CD pipelines, IaC, microservices (ECS, EKS, Lambda)

Daily Notes

May 18 — Python Modules, File Handlers, JSON, PIP, GitHub & Git Basics

May 19 — Bioinformatics Labs (Insulin Analysis), String Handling, Dictionaries

May 20 — SysAdmin with Python, subprocess, VS Code Debugging

May 21 — Debugging & Testing, Caesar Cipher Debug Lab, DevOps & CI/CD

May 22 — Automation vs Orchestration, Microservices, PyLint/PyTest, Version Control

May 24 — Prime Numbers, Palindrome, LeetCode, Nested Loops, Python Tips