In this article, special functions and constants in python are there with respect to data science.

**gamma() –**In this function, a value is given as an argument, and it returns the**gamma function**of the argument.

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**pi –**It is an in-built constant and returns the value of pi (3.141592)**e –**It is an in-built constant and returns the value of e (2.718281)

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**inf –**This constant is a positive floating point infinity constant.**–inf**is there when we want to denote a negative floating point infinity. So, we find this constant in Python 3.5 and above.**isinf() –**This function helps to check if the value is infinity or not.**nan –**It is a constant which denotes “Not a number” in Python. This constant is found in Python 3.5 and above.**isnan() –**If a number is**nan**then it returns true, otherwise false.

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To learn more about functions in python for data science, you can check this and this as well.