Python Apply Function: Replacement Guide

In Python, the apply function has been deprecated in Python 3 and is also not recommended in Python 2. In newer versions of Python, the functionality of the apply function can be replaced by using the function call operator “()”.

In older versions of Python, the apply function was used to apply a function to a given list of parameters. Its usage was as follows:

apply(function, args [, kwargs])

In this case, the function is the function to be applied, args is a tuple containing arguments, and kwargs is a dictionary containing keyword arguments.

For example, let’s say there is a function called add that is used to calculate the sum of two numbers.

def add(a, b):
    return a + b

You can use the apply function to apply the add function to the arguments (2, 3):

result = apply(add, (2, 3))
print(result)  # 输出：5

However, since the apply function has been deprecated in newer versions of Python, it is recommended to directly call the function using the function call operator “()” as shown below:

result = add(2, 3)
print(result)  # 输出：5

Therefore, in the new version of Python, the apply function is no longer needed.