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python wrapper for opensha using py4j
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GNS-Science/opensha-py
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README.md
A python bridge for opensha based onpy4j.org
Taking the example fromhttps://github.com/opensha/opensha-core/blob/master/src/org/opensha/sha/examples/HazardCurveCalcExample.javaand wrapping it with a py4j gateway.
Now, we can do this in python...
#!pythonfrompy4j.java_gatewayimportJavaGatewaygateway=JavaGateway()hazard_calc_app=gateway.entry_pointprint('HazardCurve calculation with default timespan = 30 years')hazard_calc_app.execute(34.2,-118.344)print('HazardCurve calculation with timespan = 50 years')hazard_calc_app.setTimeSpan(50)hazard_calc_app.execute(34.2,-118.344)
prerequisites:
- python3
- py4j
Note the opensha-py project is cloned into a folder containing the main opensha repos - seehttps://github.com/opensha/opensha-commons/blob/master/README.md)
The class path includes:
- the 'fat' opensha Jar file
- the py4j Jar
- opensha-py/src/java
export OPENSHA_PY_CLASSPATH=opensha-core/build/libs/opensha-core-all.jar:opensha-py/share/py4j/py4j0.10.9.jar:opensha-py/src/java:.javac -cp$OPENSHA_PY_CLASSPATH opensha-py/src/java/org/opensha/py/HazardCurveCalcGateway.java
java -cp$OPENSHA_PY_CLASSPATH org.opensha.py.HazardCurveCalcGatewaypython opensha-py/src/test_gateway.py