python_3_stdin_stdout_stderr_encoding

Example Python program python_3_stdin_stdout_stderr_encoding.py

Modules

• import sys
• import io

Code

Python example

import sys
import io

# Python 3's std stream encoding is determined by locale or `PYTHONIOENCODING` environment variables
# however if you want to explicitly maintain an encoding regardless of environment
# you need to do this:

sys.stdin = io.TextIOWrapper(
    sys.stdin.buffer,
    encoding='utf-8',
    errors=sys.stdin.errors,
    newline=sys.stdin.newlines,
    line_buffering=sys.stdin.line_buffering)

sys.stdout = io.TextIOWrapper(
    sys.stdout.buffer,
    encoding='utf-8',
    errors=sys.stdout.errors,
    newline=sys.stdout.newlines,
    line_buffering=sys.stdout.line_buffering)

sys.stderr = io.TextIOWrapper(
    sys.stderr.buffer,
    encoding='utf-8',
    errors=sys.stderr.errors,
    newline=sys.stderr.newlines,
    line_buffering=sys.stderr.line_buffering)

# the last parameter `write_through` does not appear to be perserved in the existing streams
# it would be prudent to find out the value of `write_through` for the original streams
# and pass them along if you **only** want to change the encoding of the streams

# furthermore for any `open` calls, you must pass the `encoding` parameter

Useful Links

• Articles: https://python-commandments.org/
• Python shell: https://bsdnerds.org/learn-python/
• Tutorial: https://pythonprogramminglanguage.com/