Coding Style

Lines length should not exceed 80 characters, as per PEP 8.

Encoding

Every Python source file should be encoded as UTF-8. As per PEP 263, the first or the second line must be:

# coding=utf-8

Data Sets

For each data set, please provide a comment with reference to the source and/or origin of the data.

Name Lists

When you have long lists of names, please order them alphabetically. Keep the lines length as close as possible to 80 characters, without exceeding the limit.