New submission from Lorem Ipsum: Python 3.5.4 Tutorial Section 8.5. User-defined Exceptions Paragraph 2 (https://docs.python.org/3.5/tutorial/errors.html#user-defined-exceptions) states [emphasis mine]: "When creating a module that can raise several distinct errors, a common practice is to create a base class for exceptions defined by that module, and SUBCLASS THAT TO create specific exception classes for different error conditions:" The use of 'subclass' as a verb when it has not been used so prior is confusing, especially to beginners. The concept of a class is not formally covered until Section 9 and up until this point in the tutorial, 'class' has been used as a noun. When read with 'subclass' as a noun, the sentence is nonsensical. It may also be that the comma which precedes 'and' is not proper usage. Suggested improvement: change "subclass that to create specific classes for..." to "then create specific exception subclasses for..." "When creating a module that can raise several distinct errors, a common practice is to create a base class for exceptions defined by that module, and then create specific exception subclasses for different error conditions:" ---------- assignee: docs@python components: Documentation messages: 299962 nosy: Lorem Ipsum, docs@python priority: normal severity: normal status: open title: Tutorial wording implies an understanding of a concept prior to it being introduced type: enhancement versions: Python 3.5 _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue31152> _______________________________________