- For efficiency reasons, each module is only imported once per interpreter session. Therefore, if you change your modules, you must restart the interpreter – or, if it’s just one module you want to test interactively, use reload(), e.g. reload(modulename).
- The modification time
of the version of spam.py used to create spam.pyc is recorded in
spam.pyc, and the .pyc file is ignored if these don’t match.
- A program doesn’t run any faster when it is read from a .pyc or
.pyo file than when it is read from a .py file; the only thing
that’s faster about .pyc or .pyo files is the speed with which
they are loaded.
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