On 15/07/12 10:44:09, Chris Angelico wrote: > On Sun, Jul 15, 2012 at 6:32 PM, Steven D'Aprano > <steve+comp.lang.pyt...@pearwood.info> wrote: >> At compile time, Python parses the source code and turns it into byte- >> code. Class and function definitions are executed at run time, the same >> as any other statement. > > Between the parse step and the 'def' execution, a code object is > created. When you call it, that code object already exists. Nothing > else really matters, unless there's a bug in the Python optimizer or > something weird like that. The nearest thing Python _has_ to a > "compile time" is the execution of def. > > ChrisA
"Compile time" is the phase when your Python code is turned into byte code, or a SyntaxError is raised. In this phase, a "code object" is created for the function. "Function definition time" is when the "def" command is executed. In this phase, default arguments are computed, and a "function object" is created. Among the attributes of the function object are the code object, and "cell" objects containing the bindings for its non-local variables. These bindings are used to read the variable's current value at the time the function uses the variable. -- HansM -- http://mail.python.org/mailman/listinfo/python-list
