Python wrapper for the IBM RXN for Chemistry API
A python wrapper to access the API of the IBM RXN for Chemistry website.
Install
From PYPI:
pip install rxn4chemistryOr directly from the repo:
pip install git+https://github.com/rxn4chemistry/rxn4chemistry.gitUsage
By default, the wrapper connects to the https://rxn.res.ibm.com server. This can be overriden by setting an environment variable. To set a different url, simply do:
export RXN4CHEMISTRY_BASE_URL="https://some.other.rxn.server"The base url can be directly set when instantiating the RXN4ChemistryWrapper (this will overwrite the environment variable):
api_key = 'API_KEY'
from rxn4chemistry import RXN4ChemistryWrapper
rxn4chemistry_wrapper = RXN4ChemistryWrapper(api_key=api_key, base_url='https://some.other.rxn.server')
# or set it afterwards
# rxn4chemistry_wrapper = RXN4ChemistryWrapper(api_key=api_key)
# rxn4chemistry_wrapper.set_base_url('https://some.other.rxn.server')Create a project
Get your API key from here and build the wrapper:
api_key = 'API_KEY'
from rxn4chemistry import RXN4ChemistryWrapper
rxn4chemistry_wrapper = RXN4ChemistryWrapper(api_key=api_key)
# NOTE: you can create a project or set an esiting one using:
# rxn4chemistry_wrapper.set_project('PROJECT_ID')
rxn4chemistry_wrapper.create_project('test_wrapper')
print(rxn4chemistry_wrapper.project_id)Reaction prediction
Running a reaction prediction is as simple as:
response = rxn4chemistry_wrapper.predict_reaction(
'BrBr.c1ccc2cc3ccccc3cc2c1'
)
results = rxn4chemistry_wrapper.get_predict_reaction_results(
response['prediction_id']
)
print(results['response']['payload']['attempts'][0]['smiles'])Extracting actions from a paragraph describing a recipe
Extract the actions from a recipe:
results = rxn4chemistry_wrapper.paragraph_to_actions(
'To a stirred solution of '
'7-(difluoromethylsulfonyl)-4-fluoro-indan-1-one (110 mg, '
'0.42 mmol) in methanol (4 mL) was added sodium borohydride '
'(24 mg, 0.62 mmol). The reaction mixture was stirred at '
'ambient temperature for 1 hour.'
)
print(results['actions'])Retrosynthesis prediction
Predict a retrosynthetic pathway given a product:
response = rxn4chemistry_wrapper.predict_automatic_retrosynthesis(
'Brc1c2ccccc2c(Br)c2ccccc12'
)
results = rxn4chemistry_wrapper.get_predict_automatic_retrosynthesis_results(
response['prediction_id']
)
print(results['status'])
# NOTE: upon 'SUCCESS' you can inspect the predicted retrosynthetic paths.
print(results['retrosynthetic_paths'][0])See here for a more comprehensive example.
Biocatalysed retrosynthesis prediction
Predict a biocatalysed retrosynthetic pathway given a product by specifying the model trained on biocatalysed reactions:
response = rxn4chemistry_wrapper.predict_automatic_retrosynthesis(
'OC1C(O)C=C(Br)C=C1', ai_model='enzymatic-2021-04-16'
)
results = rxn4chemistry_wrapper.get_predict_automatic_retrosynthesis_results(
response['prediction_id']
)
print(results['status'])
# NOTE: upon 'SUCCESS' you can inspect the predicted retrosynthetic paths.
print(results['retrosynthetic_paths'][0])Create a synthesis and start it on the robot (or simulator)
Create a synthesis from a retrosynthesis sequence:
# Each retrosynthetic path predicted has a unique sequence_id that can
# be used to create a new synthesis
response = rxn4chemistry_wrapper.create_synthesis_from_sequence(
sequence_id=results['retrosynthetic_paths'][0]['sequenceId']
)
print(response['synthesis_id'])
# get the entire list of actions for the entire synthesis, as well as a tree representation
synthesis_tree, ordered_tree_nodes, ordered_list_of_actions = rxn4chemistry_wrapper.get_synthesis_plan(
synthesis_id=response['synthesis_id']
)
for action in ordered_list_of_actions:
print(action)
synthesis_status_result = rxn4chemistry_wrapper.start_synthesis(
synthesis_id=response['synthesis_id']
)
print(synthesis_status_result['status'])
synthesis_status_result = rxn4chemistry_wrapper.get_synthesis_status(
synthesis_id=response['synthesis_id']
)
print(synthesis_status_result['status'])Forward prediction in batch
It is possible to run a batch of forward reaction predictions without linking them to a project:
response = rxn4chemistry_wrapper.predict_reaction_batch(precursors_list=['BrBr.c1ccc2cc3ccccc3cc2c1', 'Cl.c1ccc2cc3ccccc3cc2c1']*5)
# wait for the predictions to complete
time.sleep(2)
print(rxn4chemistry_wrapper.get_predict_reaction_batch_results(response["task_id"]))NOTE: the results for batch prediction are not stored permanently in our databases, so we strongly recommend to save them since they will expire.
Prediction of multiple reaction outcomes (in batch)
It is also possible to predict multiple forward reaction prediction outcomes in batch:
response = rxn4chemistry_wrapper.predict_reaction_batch_topn(
precursors_lists=[
["BrBr", "c1ccc2cc3ccccc3cc2c1"],
["BrBr", "c1ccc2cc3ccccc3cc2c1CCO"],
],
topn=3,
)
# wait for the predictions to complete
time.sleep(2)
print(rxn4chemistry_wrapper.get_predict_reaction_batch_topn_results(response["task_id"]))NOTE: the results for batch prediction are not stored permanently in our databases, so we strongly recommend to save them since they will expire.
Enable logging
Logging by the library is disabled by default as it may interfere with programmatic uses.
In the very top of the rxn4chemistry_tour.ipynb example notebook you can see a line that enables all logging in the notebook.
import logging
logging.basicConfig(level=logging.INFO, format='%(levelname)s : %(message)s')This may also enable logging from other libraries. If you wish to selectively enable the logs from rxn4chemistry, consider something like this:
import logging
logger = logging.getLogger("rxn4chemistry")
handler = logging.StreamHandler()
handler.setFormatter(logging.Formatter('%(levelname)s : %(message)s'))
logger.addHandler(handler)
logger.setLevel(logging.DEBUG)Examples
To learn more see the examples.
Documentation
The documentation is hosted here using GitHub pages.