added data engineering lessons and code

Author: GokuMohandas

.gitignore

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+# Data
+logs/
+stores/
+
+# VSCode
+.vscode/
+.idea
+
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# Flask:
+instance/
+.webassets-cache
+
+# Scrapy:
+.scrapy
+
+# Sphinx
+docs/_build/
+
+# PyBuilder
+target/
+
+# IPython
+.ipynb_checkpoints
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# PEP 582
+__pypackages__/
+
+# Celery
+celerybeat-schedule
+celerybeat.pid
+
+# Environment
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# mkdocs
+site/
+
+# Airflow
+airflow/airflow.db
+
+# MacOS
+.DS_Store