CODEWITHSUNDEEP
python
Geoff
Geoff

Reputation: 1007

Python functions with dots

I have defined a of ordered pairs called f and defined a function applyfunction that goes through the ordered pairs looking at the first value to compare and when it does match to print the second value.

f = {(1,2),(2,4),(3,6),(4,8)}


def applyfunction (f,x):
    for xy in f:
        if xy[0]==x:
            print(xy[1])


applyfunction(f,3)

The above works just the way I want it to. In the meantime I have seen that in python there are functions that have a dot notation and I think that would be useful here. So my question, how can I rewrite the applyfunction definition such that I can use the following notation: f.applyfunction(3)?

Upvotes: 2

Views: 1031

Answers (2)

Sanmitha Sadhishkumar
Sanmitha Sadhishkumar

Reputation: 257

Dots are used to access methods of a class using its object name. If you want to access that using dot operator, create an object called f for a class with a method applyfunction. Then you can accomplish your desired task

Upvotes: 1

Andreas
Andreas

Reputation: 9207

You can wrap the ordered pairs into a class of your own, which has the method (method == a function inside a class) you mentioned inside of it.

class OrderedPairWrapper():
    
    def __init__(self, op):
        self.op = op
    
    def applyfunction (self, x):
        for xy in self.op:
            if xy[0]==x:
                print(xy[1])

f = {(1,2),(2,4),(3,6),(4,8)}
f = OrderedPairWrapper(f)

print(f.applyfunction(3))
# 6

Upvotes: 2

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