entire source file after includes, gflags defi- nitions/declarations and forward declarations of classes from other namespaces. // In the .h file namespace mynamespace { // All declarations are within • Do not declare anything in namespace std, including forward declarations of standard library classes. Declaring entities in namespace std is unde- fined behavior, i.e., not portable. To declare entities depend on external variables, and should nearly always exist in a namespace. Rather than creating classes only to group static member functions which do not share static data, use namespaces instead. For

Contents Python Language Rules Lint Imports Packages Exceptions Global variables Nested/Local/Inner Classes and Functions List Comprehensions Default Iterators and Operators Generators Lambda Functions Conditional Rules Semicolons Line length Parentheses Indentation Blank Lines Whitespace Shebang Line Comments Classes Strings Files and Sockets TODO Comments Imports formatting Statements Access Control Naming Main through public module level functions; see Naming below. Nested/Local/Inner Classes and Functions link￿ Nested/local/inner classes and functions are fine. Definition: A class can be defined inside of a

great effect on learnability, but there is no single correct recipe for how to do it. Different classes may order their members differently. What is important is that each class order its members in some (otherCondition()) { somethingElse(); } else { lastThing(); } } }; A few exceptions for enum classes are given in Section 4.8.1, Enum classes. 4.1.3 Empty blocks: may be concise 5 An empty block or block-like construct Between consecutive members (or initializers) of a class: fields, construc- tors, methods, nested classes, static initializers, instance initializers. 7 • Exception: A blank line between two consecutive