How Can I Disable Output Buffering for sys.stdout in Python?

Disabling Output Buffering in Python's Interpreter for sys.stdout

Python's interpreter enables output buffering by default for sys.stdout, a file-like object that accepts standard output.

Disabling Buffering Methods:

To disable output buffering, there are several approaches:

• Command Line Switch:

python -u [script.py]

• Wrapper Class for sys.stdout:

class Unbuffered(object):
    def __init__(self, stream):
        self.stream = stream
    def write(self, data):
        self.stream.write(data)
        self.stream.flush()
    def writelines(self, datas):
        self.stream.writelines(datas)
        self.stream.flush()
    def __getattr__(self, attr):
        return getattr(self.stream, attr)

import sys
sys.stdout = Unbuffered(sys.stdout)

• PYTHONUNBUFFERED Environment Variable:

Setting this variable to a non-empty value disables buffering:

export PYTHONUNBUFFERED=1

• Changing sys.stdout File Descriptor:

This method involves opening a new file descriptor without buffering:

import os
sys.stdout = os.fdopen(sys.stdout.fileno(), 'w', 0)

Additionally, as mentioned in the question, global flags can be set programmatically during execution. However, there doesn't appear to be an explicit global flag that disables output buffering.

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