Helpful Python Links

SOLID

• SOLID Principles: Improve Object-Oriented Design in Python

Project Structure

• What is the best project structure for a Python application?

  Project/
  |-- bin/
  |   |-- project
  |
  |-- project/
  |   |-- test/
  |   |   |-- __init__.py
  |   |   |-- test_main.py
  |   |   
  |   |-- __init__.py
  |   |-- main.py
  |
  |-- setup.py
  |-- README
  

Error Handling

• Try, Except for API connections

url='http://www.google.com/blahblah'

try:
    r = requests.get(url,timeout=3)
    r.raise_for_status()
except requests.exceptions.HTTPError as errh:
    print ("Http Error:",errh)
except requests.exceptions.ConnectionError as errc:
    print ("Error Connecting:",errc)
except requests.exceptions.Timeout as errt:
    print ("Timeout Error:",errt)
except requests.exceptions.RequestException as err:
    print ("OOps: Something Else",err)

Http Error: 404 Client Error: Not Found for url: http://www.google.com/blahblah

init py

• What is init py for?

database/
    __init__.py
    schema.py
    insertions.py
    queries.py

__init__.py
import os

from sqlalchemy.orm import sessionmaker
from sqlalchemy import create_engine

engine = create_engine(os.environ['DATABASE_URL'])
Session = sessionmaker(bind=engine)

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