Read one JSON document per line.

Python: Parse nonempty JSON Lines records independently instead of loading a JSON array.

import json
text = '{"id":1}\n{"id":2}\n'
for line in text.splitlines():
    if line.strip():
        print(json.loads(line)["id"])

Expected output EXAMPLE

1
2

Details

Save as snippet.py and run python3 snippet.py. Uses the Python standard library. Parse nonempty JSON Lines records independently instead of loading a JSON array.

✓ Verified

Tested on Ubuntu 24.04.5 LTS · 2026-11-02 18:01:35 UTC · Python 3.12.3 · python3 3.12.3-0ubuntu2.1

Test inputs, results and environment

The exact published code ran in a dedicated Linux test container with prepared inputs. Unprivileged snippet process, external networking disabled, read-only root filesystem, and a fresh temporary working directory. Fixtures and output records are isolated from the application database. Testing covers this example and its stated checks, not every input, operating system, or runtime version. The Linux container shares its host's kernel; this is not a native Windows test.

Architecture / host kernel: x86_64 / 6.18.54.1-microsoft-standard-WSL2
Snippet identity / locale: uid=65534, gid=65534 (unprivileged) / C.UTF-8
Interpreter invocation: python3 -c <published code>
Container image ID: sha256:32dc2d998158b6554c99b73b533f423696a0f3e31e8cbea9db10b5eee9a2fadd
Code SHA-256: e2fb5d263e3aa5083ba074d15fc03a40a0475f4d59bec23f4b93b27d3b081695
Dependencies: python3 3.12.3-0ubuntu2.1

Test input setup

These are the prepared inputs used by the test harness. See Details above for the prerequisites and how to run this example.

# No input files required.

Observed standard output

1
2

Exit code: 0. Standard error: empty. Validation: Exact stdout comparison. System-dependent values above are one recorded run.