Open edX Cheminformatics Helper

2.0.0 verified Fri May 01 auth: no python

A helper library for chemistry calculations, used by the edx-platform. Version 2.0.0 is the latest stable release. Originally part of edx-platform, it was spun off as an independent package. Release cadence is irregular.

pip install chem

Common errors

error ModuleNotFoundError: No module named 'chem' ↓

cause The package is not installed, or the import name is different.

fix

Run 'pip install chem' and ensure the import is 'import chem'.

error ImportError: cannot import name 'add' from 'chem' ↓

cause The 'add' function was removed in version 2.0.0.

fix

Use 'from chem import calculate' instead, or downgrade to 1.3.0.

Warnings

gotcha The package name 'chem' is very short and may conflict with other packages. Ensure you are installing the correct 'chem' from PyPI. ↓

fix Pin to version: pip install chem==2.0.0

breaking Version 2.0.0 introduced a breaking change: the function 'add' was removed and replaced by 'calculate'. Check changelog for details. ↓

fix Use 'calculate' instead of 'add'.

Imports

chem
```
import chem
```
The package is named 'chem' on PyPI, but the module is also 'chem'. No common wrong import.

Quickstart

Import the library and use its functions. Replace with actual API calls from documentation.

import chem

# Example: access chemistry constants or functions
from chem import some_function  # replace with actual function
print(chem.__version__)