Read a text file.
Open a UTF-8 text file and read its contents. A context manager closes the file automatically, even if reading fails.
with open("notes.txt", "r", encoding="utf-8") as file:
contents = file.read()
print(contents, end="")Expected output EXAMPLE
Hello, Python!
Details
Uses only the Python standard library; no pip packages are required. See the verification record below for the exact Python version tested.
Create notes.txt in your working directory first. read() loads the whole file into memory; iterate over the file for large inputs.
Tested on Ubuntu 24.04.5 LTS · · 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
c98b37b5386082dcbb82bde4891560c7f2e88ad500101a9439cb30484bcd61b5- 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.
printf 'Hello, Python!\n' > notes.txt
Observed standard output
Hello, Python!
Exit code: 0. Standard error: empty. Validation: Exact stdout comparison. System-dependent values above are one recorded run.