EOFError: End of File When Reading Input

EOFError: EOF when reading a line

Quick Answer

input() reached end of file with no data. This happens when running scripts non-interactively (piped input, automated tests) and there is no input to read.

Why This Happens

input() reads from stdin. When stdin is empty or closed (piped input, cron jobs, Docker), it raises EOFError. Handle this for scripts that may run non-interactively.

The Problem

name = input('Enter name: ')  # Fails in non-interactive mode

The Fix

try:
    name = input('Enter name: ')
except EOFError:
    name = 'default'

# Or use sys.stdin:
import sys
if sys.stdin.isatty():
    name = input('Enter name: ')
else:
    name = sys.stdin.readline().strip() or 'default'

Step-by-Step Fix

  1. 1

    Handle EOFError

    Wrap input() in try/except EOFError.

  2. 2

    Check if interactive

    Use sys.stdin.isatty() to detect interactive mode.

  3. 3

    Use argparse for scripts

    Accept input via command-line arguments instead.

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