Quick Answer
Dunder (double underscore) methods are special methods that Python calls implicitly. __init__ (construction), __str__ (string representation for print), __repr__ (detailed representation), __len__ (len()), __getitem__ (indexing []), __iter__ (iteration), __eq__ (==), __lt__ (<), __add__ (+), __enter__/__exit__ (with statement), __call__ (callable objects). Implementing them makes your classes work naturally with Python built-ins.
Answer
Special methods like __init__, __str__, __repr__, __eq__, __add__. Used for operator overloading and customizing built-in behavior. Example: obj1 + obj2 calls obj1.__add__(obj2).
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
