OLife'S
lines = list(open('file.txt'))
File & I/O Operations

Meaning

Reads all lines of a file into a list of strings, each line retaining its trailing newline character. Useful when you need to iterate over the file contents multiple times or perform random access on lines.

Primary Function

File I/O

Communicative Purpose

Load file content line‑by‑line for subsequent processing

Pattern

lines = list(open(filepath))

Core Structure

list(open(...))

Função primária

File I/O

Propósito comunicativo

Load file content line‑by‑line for subsequent processing

Situações de gatilho

reading small configuration files; loading log files for analysis; preparing text data for batch processing

Contextos

scripts; data‑processing utilities; educational examples

Padrão

lines = list(open(filepath))

Estrutura central

list(open(...))

Slots de substituição

filepath: str (path to the file to read)

Colocados típicos

  • with open(...) as f: lines = f.readlines()
  • pathlib.Path.read_text().splitlines()

Substituições comuns

  • open(filepath).readlines()
  • list(open(filepath
  • 'r'))

Erros comuns

leaving the file open (resource leak); assuming the file exists without error handling; using binary mode unintentionally

Similar / contraste

with open(filepath) as f: lines = f.readlines() – ensures the file is closed automatically; pathlib.Path(filepath).read_text().splitlines() – returns lines without newline characters

Interferências

Coming from languages with automatic resource management (e.g., C# using, Java try‑with‑resources): may forget to close the file explicitly.; Coming from C: may expect an explicit fopen/fclose pair and overlook Python’s garbage‑collection timing.

Família do chunk

  • file reading
  • line iteration
  • context managers

Nuance

The file remains open until the list object is garbage‑collected, which can cause resource exhaustion in long‑running programs. For large files, consider iterating directly or using a with statement.

Efeito pragmático

Provides a quick way to load an entire file into memory for random access

Dica de memória

Listify the opened file

Nota

The file remains open until the list object is garbage‑collected, which can cause resource leaks in long‑running programs; prefer using a with statement or explicitly closing the file.

Upgrade path

with open(filepath) as f: lines = f.readlines()

Frequência: MediumFormulaicidade: Semi-fixedTipo de construção: list constructor applied to the file object returned by open()Prioridade de aquisição: Active recallPrioridade de output: BothTag de espaçamento: Short-termIdioma?: Sim

Log in to save chunks.