compile python .py file without executing
Question:
Is there a way to compile a Python .py file from the command-line without executing it?
I am working with an application that stores its python extensions in a non-standard path with limited permissions and I’d like to compile the files during installation. I don’t need the overhead of Distutils.
Answers:
The py_compile module provides a function to generate a byte-code file from a source file, and another function used when the module source file is invoked as a script.
python -m py_compile fileA.py fileB.py fileC.py
$ python -c "import py_compile; py_compile.compile('yourfile.py')"
or
$ python -c "import py_compile; py_compile.compileall('dir')"
Yes, there is module compileall. Here’s an example that compiles all the .py files in a directory (but not sub-directories):
python -m compileall -l myDirectory
In fact if you’re on Linux you may already have a /usr/bin/py_compilefiles command in your PATH. It wraps the the py_compile module mentioned by other people. If you’re not on Linux, here’s the script code.
I would say something like this, so you can compile it to your chosen location:
import py_compile
py_compile(filename+".py",wantedlocation+wantedname+".pyc")
As I have now done in my Python project on github.com/lolexorg/Lolex-Tools
In addition to choose the output location of pyc (by @Jensen Taylor’s answer),
you can also specify a source file name you like for traceback if you don’t want the absolute path of py file to be written in the pyc:
python -c "import py_compile; py_compile.compile('src.py', 'dest.pyc', 'whatever_you_like')"
Though “compileall -d destdir” can do the trick too, it will limit your working directory sometimes.
For example, if you want source file name in pyc to be “./src.py”, you have to move working directory
to the folder of src.py, which is undesirable in some cases, then run something like “python -m compileall -d ./ .”
Is there a way to compile a Python .py file from the command-line without executing it?
I am working with an application that stores its python extensions in a non-standard path with limited permissions and I’d like to compile the files during installation. I don’t need the overhead of Distutils.
The py_compile module provides a function to generate a byte-code file from a source file, and another function used when the module source file is invoked as a script.
python -m py_compile fileA.py fileB.py fileC.py
$ python -c "import py_compile; py_compile.compile('yourfile.py')"
or
$ python -c "import py_compile; py_compile.compileall('dir')"
Yes, there is module compileall. Here’s an example that compiles all the .py files in a directory (but not sub-directories):
python -m compileall -l myDirectory
In fact if you’re on Linux you may already have a /usr/bin/py_compilefiles command in your PATH. It wraps the the py_compile module mentioned by other people. If you’re not on Linux, here’s the script code.
I would say something like this, so you can compile it to your chosen location:
import py_compile
py_compile(filename+".py",wantedlocation+wantedname+".pyc")
As I have now done in my Python project on github.com/lolexorg/Lolex-Tools
In addition to choose the output location of pyc (by @Jensen Taylor’s answer),
you can also specify a source file name you like for traceback if you don’t want the absolute path of py file to be written in the pyc:
python -c "import py_compile; py_compile.compile('src.py', 'dest.pyc', 'whatever_you_like')"
Though “compileall -d destdir” can do the trick too, it will limit your working directory sometimes.
For example, if you want source file name in pyc to be “./src.py”, you have to move working directory
to the folder of src.py, which is undesirable in some cases, then run something like “python -m compileall -d ./ .”