1.1.1.0 PCEP-30-02 Practice Test Compendium – Exam Block #4

Exam block #4: Functions and Exceptions

Study Pages

Objectives covered by the block:

PCEP 4.1 Decompose the code using functions

• defining and invoking user-defined functions and generators; the return keyword, returning results, the None keyword, recursion.

PCEP 4.2 Organize interaction between the function and its environment

• parameters vs. arguments; positional, keyword and mixed argument passing; default parameter values, name scopes, name hiding (shadowing), the global keyword.

PCEP 4.3 Python Built-In Exceptions Hierarchy

• BaseException, Exception, SystemExit, KeyboardInterrupt, abstract exceptions, ArithmeticError, LookupError along with IndexError and KeyError; TypeError and ValueError exceptions, the AssertError exception along with the assert keyword.

PCEP 4.4 Basics of Python Exception Handling

• try-except, try-except Exception, ordering the except branches, propagating exceptions through function boundaries; delegating responsibility for handling exceptions.