How Do I Call One Member Function From Another Within the Same Python Class?

Accessing Member Functions Within a Class

In Python, classes can contain various methods for performing specific tasks. One common scenario is to have two methods within the same class, with one method calling the other. However, the syntax for achieving this may not be immediately obvious.

Example Scenario

Consider the following code snippet:

class Coordinates:
    def distToPoint(self, p):
        # Calculate distance using Pythagoras

    def isNear(self, p):
        distToPoint(self, p)
        # ...

In this example, the Coordinates class defines two methods: distToPoint, which calculates the distance between this coordinate and another point, and isNear, which checks if this coordinate is near the specified point. Our goal is to invoke distToPoint within isNear.

Solution: Using Member Function Invocation

To call a member function within the same class, we use the syntax self.(arguments). In this case, self refers to the current instance of the class, and function_name is the name of the function we want to invoke.

Therefore, in the isNear method, we would call distToPoint as follows:

def isNear(self, p):
    self.distToPoint(p)
    # ...

By using this approach, we can seamlessly call member functions from within the same class.

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