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[rajesh-krishnan]

Thank you for implementing IBLT in Python and sharing it.

I was looking for a Python alternative for https://github.com/gavinandresen/IBLT_Cplusplus and your solution comes close, but it will be useful to have a __sub__ method for use in data set reconciliation algorithms that require calculating the difference of IBLT instances.

One can extend the IBLT class with something along the lines of the __subtract() method in https://github.com/fle-internal/database-iblt/blob/master/iblt.py, which appears to be a derivative of your implementation.