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Concepts·Certified Associate Python Programmer

Python Methods and self

PCAP objective 4.3 is equip a class with methods. A method is a function defined in a class whose first parameter receives the instance - and `self` is only a convention for that parameter's name. The examinable consequences are the two `TypeError`s the extra argument produces, and the fact that `obj.method` and `Class.method` are different objects.

Object-Oriented Python Guide 14 of 25 Intermediate

Written against the versions above. Unbound methods were removed in Python 3: `Class.method` is a plain function now, not a special object. Python 2 material describing unbound methods no longer applies.

One machine, and any shell with Python 3 will do - these exams test the language, not a distribution.
Server NameIP AddressOSRolesCPURAMHDD
RUNNER01192.168.0.27Ubuntu 26.04 LTSPython 3.14.4 - the only machine this path needs2 Core4 GB50 GB

Before you start

  1. self is the instance

  2. The same method reached two ways

  3. One argument too many

  4. Forgetting self in the definition

  5. self is a convention, not a keyword

  6. Methods calling methods

  7. Forgetting self inside the method

  8. What the exam does with this objective

Official sources

← All PCAP guides