Scientific Computing with Python 3

Anonymous functions - the  lambda keyword

The keyword lambda is used in Python to define anonymous functions, that is; functions without a name and described by a single expression. You might just want to perform an operation on a function that can be expressed by a simple expression without naming this function and without defining this function by a lengthy def block.

Note

The name lambda originates from a special branch of calculus and mathematical logic, the -calculus.

For instance, to compute the following expression, we may use SciPy’s function quad, which requires the function to be integrated as its first argument and the integration bounds ...