The Ten Commandments

1. English is compulsory
2. Lines are never more than 80 characters wide
3. Spaces after commas (green, eggs, and, ham) and around operators (i = i + 1)
4. Indentation is four spaces per level, 8 level for continuation
5. Constants must be in BLOCK_CAPITAL_WITH_UNDERSCORE
6. Class names must be in CamelCase
7. Variables, methods and functions must be lowercase_with_underscore
8. Protected module level variable must be _lowercase_with_underscore
9. Private module level variable must be __lowercase_with_underscore
10. Use i, j, k and so on for temporary and disposable variable