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This article is about how python uses function variables. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Use function variables

Python's function is also a value: all functions are function objects, which means that the function itself can be assigned to variables, just as integers, floating-point numbers, lists, and tuples can be assigned to variables.

When a function is assigned to a variable, the program can then call the function through that variable. For example, the following code:

# define a function def pow (base, exponent) that calculates the multiplier: result = 1 for i in range (1, exponent + 1): result * = base return result# assigns the pow function to my_fun Then my_fun can be regarded as pow, using my_fun = powprint (my_fun (3,4)) # output 8 to define a function def area (width, height) for calculating area: return width * height# assigns the area function to my_fun, then my_fun can be used as area using my_fun = areaprint (my_fun (3,4)) # output 12

As can be seen from the above code, the program assigns the pow () and area () functions to the my_fun variable in turn, and then you can call the pow () and area () functions respectively through the my_fun variable.

In fact, python already has a built-in method to calculate the multiplier, so the pow () function here doesn't make much practical sense, just as a demonstration.

By assigning different functions to my_fun variables, you can make my_fun point to different functions at different times, thus making the program more flexible. Thus, the advantage of using function variables is to make the program more flexible.

Thank you for reading! This is the end of this article on "how to use functional variables in python". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, you can share it for more people to see!

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