# py-rcsb_utils_chem
[](https://dev.azure.com/rcsb/RCSB%20PDB%20Python%20Projects/_build/latest?definitionId=20&branchName=master)
RCSB Python tools for accessing and annotating PDB chemical components definitions.
## Introduction
Utilities for managing, comparing and searching PDB chemical component definitions.
This module has internal dependencies on: OpenEye OECHEM toolkits, RDKIT,
OpenBabel/Pybel, and CACTVS. These dependencies require separate installation
that is described with each chemical package.
### Installation
Download the library source software from the project repository:
```bash
git clone --recurse-submodules https://github.com/rcsb/py-rcsb_utils_chem.git
```
Optionally, run test suite (Python versions 3.8) using
[setuptools](https://setuptools.readthedocs.io/en/latest/) or
[tox](http://tox.readthedocs.io/en/latest/example/platform.html):
```bash
pip install -r requirements.txt
python setup.py test
or simply run:
tox
```
Installation is via the program [pip](https://pypi.python.org/pypi/pip). To run tests
from the source tree, the package must be installed in editable mode (i.e. -e):
```bash
pip install -e .
```
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"description": "# py-rcsb_utils_chem\n\n[](https://dev.azure.com/rcsb/RCSB%20PDB%20Python%20Projects/_build/latest?definitionId=20&branchName=master)\n\nRCSB Python tools for accessing and annotating PDB chemical components definitions.\n\n## Introduction\n\nUtilities for managing, comparing and searching PDB chemical component definitions.\nThis module has internal dependencies on: OpenEye OECHEM toolkits, RDKIT,\nOpenBabel/Pybel, and CACTVS. These dependencies require separate installation\nthat is described with each chemical package.\n\n### Installation\n\nDownload the library source software from the project repository:\n\n```bash\n\ngit clone --recurse-submodules https://github.com/rcsb/py-rcsb_utils_chem.git\n\n```\n\nOptionally, run test suite (Python versions 3.8) using\n[setuptools](https://setuptools.readthedocs.io/en/latest/) or\n[tox](http://tox.readthedocs.io/en/latest/example/platform.html):\n\n```bash\n\n pip install -r requirements.txt\n python setup.py test\n\nor simply run:\n\n tox\n```\n\nInstallation is via the program [pip](https://pypi.python.org/pypi/pip). To run tests\nfrom the source tree, the package must be installed in editable mode (i.e. -e):\n\n```bash\npip install -e .\n```\n",
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