Python Cheatsheet

python_cheatsheet.md

Python Cheatsheet

Language

• Object-Oriented Programming in Python vs Java

# list comprehension
names = ['Apple', 'Banana', 'wtf']
names_length = [len(v) for v in a]
name_to_length = {v:len(v) for v in a if len(v) < 4}

Dependency management

• pip
• requirements.txt

Virtual Env

• Primer on Python Virtual Environments
• PyCharm: File -> Settings -> Project -> Python Interpreter -> Wheel

# create venv
virtualenv -p python2.7 munimap

Misc

• PEP8 Style Guide

Django

• Django

SQL migration

# create SQL scripts for table creation / migration
python manage.py makemigrations <app>
# show SQL migration script 0001
python manage.py sqlmigrate <app> 0001
# apply SQL migration scripts
python manage.py migrate

Misc

# invoke shell
python manage.py shell
# create user for admin site
python manage.py createsuperuser