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:mod:`compileall` --- Byte-compile Python libraries
===================================================
.. module:: compileall
:synopsis: Tools for byte-compiling all Python source files in a directory tree.
This module provides some utility functions to support installing Python
libraries. These functions compile Python source files in a directory tree,
allowing users without permission to write to the libraries to take advantage of
cached byte-code files.
This module may also be used as a script (using the :option:`-m` Python flag) to
compile Python sources. Directories to recursively traverse (passing
:option:`-l` stops the recursive behavior) for sources are listed on the command
line. If no arguments are given, the invocation is equivalent to ``-l
sys.path``. Printing lists of the files compiled can be disabled with the
:option:`-q` flag. In addition, the :option:`-x` option takes a regular
expression argument. All files that match the expression will be skipped.
.. function:: compile_dir(dir, maxlevels=10, ddir=None, force=False, rx=None, quiet=False)
Recursively descend the directory tree named by *dir*, compiling all :file:`.py`
files along the way. The *maxlevels* parameter is used to limit the depth of
the recursion; it defaults to ``10``. If *ddir* is given, it is used as the
base path from which the filenames used in error messages will be generated.
If *force* is true, modules are re-compiled even if the timestamps are up to
date.
If *rx* is given, it specifies a regular expression of file names to exclude
from the search; that expression is searched for in the full path.
If *quiet* is true, nothing is printed to the standard output in normal
operation.
.. function:: compile_path(skip_curdir=True, maxlevels=0, force=False)
Byte-compile all the :file:`.py` files found along ``sys.path``. If
*skip_curdir* is true (the default), the current directory is not included in
the search. The *maxlevels* and *force* parameters default to ``0`` and are
passed to the :func:`compile_dir` function.
To force a recompile of all the :file:`.py` files in the :file:`Lib/`
subdirectory and all its subdirectories::
import compileall
compileall.compile_dir('Lib/', force=True)
# Perform same compilation, excluding files in .svn directories.
import re
compileall.compile_dir('Lib/', rx=re.compile('/[.]svn'), force=True)
.. seealso::
Module :mod:`py_compile`
Byte-compile a single source file.
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