How do you make a higher order function in Python?

How do you make a higher order function in Python?

- A higher-order function accepts one or more functions as input and returns a new function. Sometimes it is required to use function as data.

- To make high order function , we need to import functools module.

- The functools.partial() function is used often for high order function.

- The functions act on or return the other functions.

- For the purpose for this module the callable object can be treated as a function.

This module defines the following functions:

- It transforms an old-style comparison function to a key function and uses the tools that accept key functions (such as sorted(), min(), max(), heapq.nlargest(), heapq.nsmallest(), itertools.groupby()).
- It is primarily used as a transition tool for programs being converted to Python 3 where comparison functions are no longer supported.

- A class defines one or more rich comparison ordering methods, where the class decorator supplies the rest.
- The effort involved is simplified by specifying all of the possible rich comparison operations:
The class must define one of __lt__(), __le__(), __gt__(), or __ge__() the class should supply an __eq__() method.

functools.reduce(function, iterable[, initializer])
- It is the same function as reduce()and is made available in this module to allow writing code more forward-compatible with Python 3.

functools.partial(func[,*args][, **keywords]):
- It returns a new partial object which when called behaves like func that is called with the positional arguments args and keyword arguments keywords.
- If more arguments are supplied to the call, then they are appended to args. If additional keyword arguments are supplied, they extend and override keywords.
How to copy an object in Python?
How to copy an object in Python - There are two ways in which objects can be copied in python. Shallow copy and Deep copy........
Methods or attributes of an object in python
Methods or attributes of an object in python - Built-in dir() function of Python ,on an instance shows the instance variables as well as the methods and class attributes defined by the instance's class and all its base classes alphabetically. ......
How do I convert a string to a number?
How do I convert a string to a number? - Python contains several built-in functions to convert values from one data type to another data type.......
Post your comment