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Pythonic access to the Alberta (Canada) Electric System Operator (AESO) Energy Trading System (ETS).

Project description

pyaeso is a python package that makes access to the Alberta, Canada, Electric System Operator’s (AESO) Energy Trading System (ETS) easier.

The Alberta Electric Systems Operator (AESO) <> operates Alberta’s deregulated electricity market. AESO provides price, demand, and other valuable information through the publically accessible Energy Trading System (ETS) website <>. This information is useful for economic analysis, power trading, electric system study, and electric system forecasting. The first step in using such information is to download it and parse it into useful data structures - a task performed by this library. Typically the data will feed statistical methods, heuristics, and system models to provide useful analysis of the Alberta electric system.

The pyaeso project is hosted at <> and releases are made via the Python Package Index at <>. Online documentation is available at <>.


A basic knowledge of the Python programming language is required to use this library. Python is an easy to learn, powerful language. An excellent introductory tutorial is available at <>.



Extract the archive, enter the recovered directory and type:

python install


Some code samples that use pyaeso are availble in the examples directory. One sample is listed here:

>>> # Standard Library imports
>>> import sys
>>> import datetime
>>> try:
...   # Python 3.x style
...   from io import BytesIO
... except ImportError:
...   # Python 2.x
...   from StringIO import StringIO as BytesIO
>>> # 3rd Party Module imports
>>> import aeso
>>> from aeso import equilibrium
>>> # Program
>>> end_date =
>>> start_date = end_dt - datetime.timedelta(1)
>>> f = BytesIO()
>>> try:
...   equilibrium.dump_equilibrium(f, start_dt, end_dt)
...   ofs =
...   data = list(equilibrium.parse_equilibrium_file(f))
... finally:
...   f.close()
>>> for d in data:
...   print d.t.astimezone(aeso.AB_TZ), '$' + str(d.price), str(d.demand) + 'MW'

Known Incompatibilities

  • Python <= 2.3 - Fails because pyaeso uses several standard library modules that were introduced in Python 2.4.

pyaeso 0.7 (2011-12-26)

  • Support for Python 2.7, 3.0, 3.1, and 3.2 added and tested.

  • Added timeout parameters to most urlopen and dump functions.

  • Simplified test infrastructure.

  • Fixed date handling in ATC to match AESO’s new format.

  • Removed all ATC functions from pyaeso.ets module. These functions have been marked as deprecated since 0.5 and have been replaced by the aeso.atc module.

  • Updated aeso.csd parser to convert total net generation values of ‘-’ to ‘None’ rather than throwing a ValueError.

  • Updated examples to use aeso package.

Bugs and Enhancements

If you would like to file a bug report or feature request then you can do so at <>.


As the maintainer of this library I, Keegan Callin, would welcome your polite, constructive comments and criticisms of this library. I can be reached by email using the address kc (at) If you need to talk to me on the telephone or send me something by snail mail, send me an email and I’ll gladly mail you instructions on how to reach me.

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