{i*i for i in range(10) if i % 2 == 0}
Built-in Data Structures

Meaning

Generates a set of squares of even numbers from 0 to 9.

Primary Function

Create a set containing the squares of each even integer in the range 0‑9.

Communicative Purpose

Express a concise set comprehension for filtering and transforming a range.

Pattern

{i*i for i in range(10) if i % 2 == 0}

Core Structure

{expression for item in iterable if condition}

Função primária

Create a set containing the squares of each even integer in the range 0‑9.

Propósito comunicativo

Express a concise set comprehension for filtering and transforming a range.

Situações de gatilho

When you need a set of squared even numbers for mathematical or data‑processing tasks.

Contextos

Used in data processing, mathematical computations, or any scenario requiring a set of derived values from a range with a condition.

Padrão

{i*i for i in range(10) if i % 2 == 0}

Estrutura central

{expression for item in iterable if condition}

Slots de substituição

{"expression":"i*i","iterable":"range(10)","condition":"i % 2 == 0"}

Colocados típicos

  • set comprehension range if square even

Substituições comuns

  • {"expression":["i*2"
  • "i**2"
  • "i+1"]
  • "iterable":["range(n)"
  • "list_of_numbers"]
  • "condition":["i%2!=0"
  • "i>5"]}

Erros comuns

Using square brackets [] producing a list instead of a set Using parentheses () producing a generator Forgotten the condition or using wrong modulus Missing the curly braces

Similar / contraste

List comprehension: [i*i for i in range(10) if i%2==0] Dict comprehension: {i:i*i for i in range(10) if i%2==0} Generator expression: (i*i for i in range(10) if i%2==0)

Interferências

Coming from Python: may confuse set comprehension with list or generator syntax — use curly braces for set comprehension; Coming from languages with ordered sets: assuming set preserves order — Python sets are unordered; Coming from languages with different modulus semantics: using incorrect condition leading to unexpected elements — verify modulus logic

Família do chunk

  • set comprehensions

Nuance

The set automatically removes duplicates, though squares of distinct even numbers in this range are already unique.

Efeito pragmático

Conveys a concise, functional‑style transformation that is both readable and efficient.

Dica de memória

even squares set comprehension

Nota

The expression i*i can be replaced with any unary operation on i.

Upgrade path

Could be rewritten using map and filter: set(map(lambda x:x*x, filter(lambda x:x%2==0, range(10)))) or using a generator expression with set().

Frequência: HighFormulaicidade: Semi-fixedTipo de construção: set comprehensionPrioridade de aquisição: Recognition firstPrioridade de output: BothTag de espaçamento: Immediate

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