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Files & data

Read and write files safely; parse JSON, CSV, and common text formats.

1 match
Files & data medium

Tail last N lines of growing log file in Python

Prints the last n lines of a log file and follows new content appended to it, polling for size changes.

log-file file-handling polling
Python 
import time
from pathlib import Path

def tail_log(file_path, n=10, poll_interval=1.0, timeout=10):
    """
    Print the last n lines and follow new lines appended to a growing log file.
    """
    path = Path(file_path)
    # Read the last n lines from the current file
    with path.open("r", encoding="utf-8") as f…
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