Originally posted by: Arun2325

I am working on a project where I continuosly keep adding new constraints using LazyConstraintCallback in Python CPLEX API. I need to check what constraints are present at each branch and bound node. Is there any way to print (similar to writeLP function) LP Solved at each node?

Originally posted by: EdKlotz

The C API has a getcallbacknodelp function that can be used to do this.   In fact, an example program that does this is available at https://www-01.ibm.com/support/docview.wss?uid=swg21400065.   However, due to the greater level of separation between the presolved model and the original model, none of the object oriented APIs support this.  Now, the legacy Python API is a bit more closely connected to the core C code, but I found no equivalent method to getcallbacknodelp, and don't see any way to query this.