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Environmental Science using Symbolic Math.

Project description

This package contains helpers to deal with physical variables and units.

The documentation is available on

The quick installation for impatient users can be done by running:

pip install essm



released 2019-04-09

Bug Fixes

  • equations: improve substitutions with equations (79ac37d)


  • utils: add definition to metadata table (3ceaa69)


released 2019-04-04

  • global: adapt to Python 3 and Sympy >=1.3
  • global: removal of SageMath mentions
  • docs: fix latex representation of x_O2 as x_{O2}
  • equations: extend replace_variables
  • equations: make .subs() on equation return an equality
  • units: reverted missing dimension lookup
  • variables: behave as Symbols
  • variables: better markdown formatting of units
  • variables: changes base class to Symbol
  • variables: enableddictionaries with symbols in replace_variables
  • variables: fix derive_unit for dimensionless expression
  • variables: fix latex rendering
  • variables: generate_metadata_table with HTML
  • variables: include assumptions from cls attribute
  • variables: modify derive_unit to work with summations
  • variables: remove Dimension deprecation warnings
  • variables: remove internal SI and refer to
  • variables: respect unit in variable with expr
  • variables: set dimension and scale factor using method
  • variables: support dimensionless variable expression
  • variables: support replacing variables by their default values


released 2017-06-29
  • Initial public release.

Project details

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