In patterns/behavioural/catalog.py , the top multiline comment says:

"A class that uses different static function depending of a parameter.."

Typo details:

• "depending of" -> should be "depending on"
• "static function" -> should be "static functions"

Suggested fix:
"A class that uses different static functions depending on a parameter passed in init. Note the use of a single dictionary instead of multiple conditions"