Install Trollius

Trollius supports Python 2.7, 3.3 and 3.4.

There is an experimental support of Python 3.5. Issues with Python 3.5:

  • don’t support asyncio coroutines
  • Task.get_task() is broken
  • repr(Task) is broken

Support of Python 2.6 and 3.2 was dropped in Trollius 2.1.

Install Trollius on Windows using pip

Since Trollius 0.2, precompiled wheel packages are now distributed on the Python Cheeseshop (PyPI). Procedure to install Trollius on Windows:

  • Install pip, download and type:

  • If you already have pip, ensure that you have at least pip 1.4. If you need to upgrade:

    \Python27\python.exe -m pip install -U pip
  • Install Trollius:

    \Python27\python.exe -m pip install trollius
  • pip also installs the futures dependency


Only wheel packages for Python 2.7, 3.3 and 3.4 are currently distributed on the Cheeseshop (PyPI). If you need wheel packages for other Python versions, please ask.

Download source code

Command to download the development version of the source code (trollius branch):

git clone -b trollius

The actual code lives in the trollius subdirectory. Tests are in the tests subdirectory.

See the trollius project at Github.

The source code of the Trollius project is in the trollius branch of the Mercurial repository, not in the default branch. The default branch is the Tulip project, Trollius repository is a fork of the Tulip repository.


Trollius requires the six module.

Python 2.7 requires futures to get a backport of concurrent.futures.

Build manually Trollius on Windows

On Windows, if you cannot use precompiled wheel packages, an extension module must be compiled: the _overlapped module (source code: overlapped.c). Read Compile Python extensions on Windows to prepare your environment to build the Python extension. Then build the extension using:

C:\Python27\python.exe build_ext


To support old Python versions, many Python modules of the standard library have been backported:

Name Python Backport
OSError 3.3 asyncio.py33_exceptions
_overlapped 3.4 asyncio._overlapped
_winapi 3.3 asyncio.py33_winapi
collections.OrderedDict 2.7, 3.1 ordereddict (PyPI)
concurrent.futures 3.2 futures (PyPI)
selectors 3.4 asyncio.selectors
ssl 3.2, 3.3 asyncio.py3_ssl
time.monotonic 3.3 asyncio.time_monotonic
unittest 2.7, 3.1 unittest2 (PyPI)
unittest.mock 3.3 mock (PyPI)
weakref.WeakSet 2.7, 3.0 asyncio.py27_weakrefset