The current version of Motor requires:

  • CPython 2.7, or 3.4 and later.
  • PyMongo 3.10 and later.

Motor can integrate with either Tornado or asyncio.

Requires the futures package from PyPI on Python 2.

The default authentication mechanism for MongoDB 3.0+ is SCRAM-SHA-1. Install backports.pbkdf2 for faster authentication with MongoDB 3.0+, especially on Python older than 2.7.8.

(Python 2.7.9 and later, or Python 3.4 and later, have builtin hash functions nearly as fast as backports.pbkdf2.)

Building the docs requires sphinx.

Starting in version 2.1, Motor offers experimental support for Windows when it is using the asyncio event loop. This means it supports Windows exclusively with Python 3, either integrating with asyncio directly or with Tornado 5 or later: starting in version 5, Tornado uses the asyncio event loop on Python 3 by default.

Compatibility Matrix

Motor and PyMongo

Motor Version PyMongo Version
1.0 3.3+
1.1 3.4+
1.2 3.6+
1.3 3.6+
2.0 3.7+
2.1 3.10+

Motor and MongoDB

MongoDB Version
  2.2 2.4 2.6 3.0 3.2 3.4 3.6 4.0 4.2
Motor Version 1.0 Y Y Y Y Y N N N N
  1.1 Y Y Y Y Y Y N N N
  1.2 N N Y Y Y Y Y N N
  1.3 N N Y Y Y Y Y N N
  2.0 N N N Y Y Y Y Y Y
  2.1 N N N Y Y Y Y Y Y

There is no relationship between PyMongo and MongoDB version numbers, although the numbers happen to be close or equal in recent releases of PyMongo and MongoDB. Use the PyMongo compatibility matrix to determine what MongoDB version is supported by PyMongo. Use the compatibility matrix above to determine what MongoDB version Motor supports.

Motor and Tornado

Where “N” appears in this matrix, the versions of Motor and Tornado are known to be incompatible, or have not been tested together.

Tornado Version
  3.x 4.x 5.x 6.x
Motor Version 1.0 Y Y N N
  1.1 Y Y N N
  1.2 N Y N N
  1.3 N Y N N
  2.0 N Y Y N
  2.1 N Y Y Y

Motor and Python

Motor 1.2 dropped support for the short-lived version of the “async for” protocol implemented in Python 3.5.0 and 3.5.1. Motor continues to work with “async for” loops in Python 3.5.2 and later.

Motor 1.2.5 and 1.3.1 add compatibility with Python 3.7, but at the cost of dropping Python 3.4.3 and older. Python 3.4.4 and later are supported by all Motor versions.

Python Version
  2.5 2.6 2.7 3.3 3.4 3.5.0 3.5.2 3.6 3.7 3.8
Motor Version 1.0 N Y Y Y Y Y Y Y N N
  1.1 N Y Y Y Y Y Y Y N N
  1.2 N N Y N Y N Y Y Y N
  1.3 N N Y N Y N Y Y Y N
  2.0 N N Y N Y N Y Y Y N
  2.1 N N Y N Y N Y Y Y Y

Not Supported

Motor does not support Jython or IronPython.