objspace.lonepycfiles¶
- name: lonepycfiles
- description: Import pyc files with no matching py file
- command-line: –objspace-lonepycfiles
- command-line for negation: –no-objspace-lonepycfiles
- option type: boolean option
- default: False
If turned on, PyPy accepts to import a module x
if it finds a
file x.pyc
even if there is no file x.py
.
This is the way that CPython behaves, but it is disabled by
default for PyPy because it is a common cause of issues: most
typically, the x.py
file is removed (manually or by a
version control system) but the x
module remains
accidentally importable because the x.pyc
file stays
around.
The usual reason for wanting this feature is to distribute
non-open-source Python programs by distributing pyc
files
only, but this use case is not practical for PyPy at the
moment because multiple versions of PyPy compiled with various
optimizations might be unable to load each other’s pyc
files.