Hi David, thanks for the explanation. That is very helpful to me.
Best regards, Torsten. David Bolen wrote: > Torsten Mohr <[EMAIL PROTECTED]> writes: > >> i tried to find the file and line in the C sources of python >> where the command "import" is implemented. Can anybody give >> me some hint on this? > > Well, there are several levels, depending on what you are looking for. > The literal "import" syntax in a source module is translated by the > Python compiler to various IMPORT_* bytecodes, which are processed in > the main interpreter loop (see ceval.c). > > They all basically bubble down to making use of the builtin __import__ > method, which is obtained from the builtin module defined in > bltinmodule.c. > > That in turn makes use of the import processing module whose code can > be found in import.c - which is the same source that also implements > the "imp" module to provide lower layer access to to the import > internals. > > Now, when it comes to physically loading in a module, Python source > and compiled modules are handled by import (well, not the compiling > part), but dynamically loaded extension modules are OS specific. You > can find the handling of such extension modules in OS-specific source > files dynload_*.c (e.g., dynload_win.c for Windows). > > All of these files can be found in the dist/src/Python directory in > the Python source tree. > > -- David -- http://mail.python.org/mailman/listinfo/python-list
