Bitbucket is a code hosting site with unlimited public and private repositories. We're also free for small teams!



What's this?

The aim of this module is to provide a common base representation of python source code for projects such as pychecker, pyreverse, pylint... Well, actually the development of this library is essentially governed by pylint's needs. It used to be called logilab-astng.

It provides a compatible representation which comes from the _ast module. It rebuilds the tree generated by the builtin _ast module by recursively walking down the AST and building an extended ast. The new node classes have additional methods and attributes for different usages. They include some support for static inference and local name scopes. Furthermore, astroid builds partial trees by inspecting living objects.

Main modules are:

  • bases, node_classses and scoped_nodes contain the classes for the different type of nodes of the tree.
  • the manager contains a high level object to get astroid trees from source files and living objects. It maintains a cache of previously constructed tree for quick access.


Extract the tarball, jump into the created directory and run:

python install

For installation options, see:

python install --help

If you have any questions, please mail the mailing list for support. See for subscription information and archives. You may find older archives at .


Tests are in the 'test' subdirectory. To launch the whole tests suite at once, you may use the 'pytest' utility from logilab-common (simply type 'pytest' from within this directory) or if you're running python >= 2.7, using discover, for instance:

python -m unittest discover -p "unittest*.py"

Recent activity

Sylvain Thénault

Sylvain Thénault pushed 3 commits to logilab/astroid

fbc83b5 - Merged in PCManticore/astroid/ancestors (pull request #29)
eaa48b7 - Add note in test regarding the .ancestors() fix. Check the _type of a base class before calling _is_metaclass again.
b1025d8 - Unwrap instances found in `.ancestors()`, by using their _proxied class. Don't inherit the metaclass status if the current class can't be a metaclass.
Tip: Filter by directory path e.g. /media app.js to search for public/media/app.js.
Tip: Use camelCasing e.g. ProjME to search for
Tip: Filter by extension type e.g. /repo .js to search for all .js files in the /repo directory.
Tip: Separate your search with spaces e.g. /ssh pom.xml to search for src/ssh/pom.xml.
Tip: Use ↑ and ↓ arrow keys to navigate and return to view the file.
Tip: You can also navigate files with Ctrl+j (next) and Ctrl+k (previous) and view the file with Ctrl+o.
Tip: You can also navigate files with Alt+j (next) and Alt+k (previous) and view the file with Alt+o.