Design-by-contract as a programming technique is becoming popular in Python community as various tools have been developed for automatically testing the code based on the contracts. However, there does not exist a sufficiently large and representative Python code base with contracts to evaluate these different testing tools. We present Python-by-contract dataset containing 556 Python functions annotated with contracts using icontract library. We show that our Python-by-contract dataset can be easily used by existing testing tools that take advantage of contracts. The demo video can be found at https://youtu.be/08wZN-xh6mY.