kimpy

kimpy is a Python interface to the KIM API.

Installing kimpy

kimpy requires KIM AIP and Python 3.7 or later.

Using conda

The recommended (and the easiest) way to install kimpy is to use the conda package manager to install both the KIM API and kimpy from the conda-forge channel.

conda install -c conda-forge kim-api kimpy

Using pip

This requires that the KIM API alreay be installed on your system. See the KIM-API docs for instructions on how to do this.

pip install kimpy

From source

This also requires that the KIM API alreay be installed on your system. See above.

git clone https://github.com/openkim/kimpy.git
pip install -e ./kimpy

Example

For an example of using kimpy, take a look at kimpy/tests/test_model.py.

Help

kimpy is designed to closely mimic the C++ KIM API with only a few changes of names. In case one wants to know the names and arguments of a class or function, Use help(object) to get help for any objects in the package.

For exampe:

1. To list all the modules in the package, do

   $ python
   >>> import kimpy
   >>> help(kimpy)

   and then you can find all the available modules under PACKAGE CONTENTS as

   PACKAGE CONTENTS
       charge_unit
       collection
       collection_item_type
       collections
       compute_argument_name
       ...
       temperature_unit
       time_unit

2. To inspect the compute_argument_name module, do

   $ python
   >>> import kimpy
   >>> help(kimpy.compute_argument_name)

   All the functions are listed under FUNCTIONS. For example,

   FUNCTIONS
       get_compute_argument_data_type(...) method of builtins.PyCapsule instance
           get_compute_argument_data_type(compute_argument_name: kimpy.compute_argument_name.ComputeArgumentName) -> KIM::DataType
   
   
           Get the data_type of each defined standard compute_argument_name.
   
           Returns:
               DataType: data_type
       get_compute_argument_name(...) method of builtins.PyCapsule instance
           get_compute_argument_name(index: int) -> kimpy.compute_argument_name.ComputeArgumentName
   
   
           Get the identity of each defined standard compute_argument_name.
   
           Returns:
               ComputeArgumentName: compute_argument_name
   
       get_number_of_compute_argument_names(...) method of builtins.PyCapsule instance
           get_number_of_compute_argument_names() -> int
   
   
           Get the number of standard compute_argument_name's defined by the KIM-API.
   
           Returns:
               int: number_of_compute_arguments

   shows that the function get_compute_argument_name takes an integer index as input, and returns an output: compute_argument_name. You can refer to KIM API docs for further information on the input and outputs.

   All the attributes of the module are listed under DATA. For example,

   DATA
       coordinates = coordinates
       numberOfParticles = numberOfParticles
       ...
       particleSpeciesCodes = particleSpeciesCodes

Copyright

Copyright (c) 2017-2023, Regents of the University of Minnesota.
All Rights Reserved

Contributing

Contributors:
      Mingjian Wen
      Yaser Afshar