How Do I Immediately Flush the Output of the Python `print` Function?

Flushing the Output of the print Function

In Python, the print function is buffered, meaning that its output is not displayed immediately but rather accumulated in an internal buffer. This can be problematic if you need to see output immediately, for example, when using print for debugging purposes.

There are two ways to force the print function to flush its output to the screen:

Python 3:

The Python 3 print function accepts an optional flush argument. Setting this argument to True forces the output to be displayed immediately.

print("Hello, World!", flush=True)

Python 2:

In Python 2, there is no built-in way to flush the output of the print function. However, you can do this by calling the flush() method of the sys.stdout object.

import sys
print("Hello, World!")
sys.stdout.flush()

Note: By default, print prints to sys.stdout, which is a file object. For more information about file objects, refer to the Python documentation.

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