CODEWITHSUNDEEP
pythonlistobjectcompare
Damiano Dotto
Damiano Dotto

Reputation: 129

Python compare and diff custom object

How can I compare two list of Objects?

This is the definition of Object:

class Form:
    def __init__(self,name, value):
        self.name = name;
        self.value = value;
        
    def __eq__(self, other):
        return self.name == other.name and self.value == other.value;

Now I've two different list of this Object "Form". How can I compare that? I've to found:

Thank you.

Upvotes: 0

Views: 150

Answers (1)

Adirio
Adirio

Reputation: 5286

The last 2 options you want to compare are the same, if you are comparing two items and the names are different, you both are different from the other.

lst_1 = [Form('a', 1), Form('b', 2), Form('c', 3)]
lst_2 = [Form('a', 1), Form('b', 0), Form('d', 3)]

if len(lst_1) != len(lst_2):
    print("WARNING: lists are of different sizes, checking the first elements")
for a, b in zip(lst_1, lst_2):
    if not isinstance(a, Form) or not isinstance(b, Form):
        raise TypeError
    if a == b:  # Both name and valua are equal
        print("They are the same Form")
    elif a.name == b.name:  # Only names are equal
        print("They have the same name but different value")
    else:  # Names are different
        print("They have different names")

Will output:

They are the same Form
They have the same name but different value
They have different names

Upvotes: 2

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