Packages: short, all-lowercase names. Preferably no underscores.=>utilities
Modules: short, all-lowercase names. Can have underscores. => db_utils
Classes: CapWords (upper camel case) convention => BankAccount
Functions: lowercase, words separated by underscores => open_account
(snake_case)
Variables: lowercase, words separated by underscores => account_id
(snake_case)
Constants: all-uppercase, words separated by underscores => MIN_APR