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There is a boolean optional argument to the print() function flush which defaults to False.
The documentation says it is to forcibly flush the stream.
I don't understand the concept of flushing. What is flushing here? What is flushing of stream?
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Pythons print method as an exclusive attribute namely, flush which allows the user to decide if he wants his output to be buffered or not. The default value of this is False meaning the output will be buffered. If you change it to true, the output will be written as a sequence of characters one after the other.
The flush argument of the print() function can be set to True to stop the function from buffering the output data and forcibly flush it. If the flush argument is set to True , the print() function will not buffer the data to increase the efficiency and will keep flushing it on each call.
file. flush forces the data to be written out at that moment. This is hand when you know that it might be a while before you have more data to write out, but you want other processes to be able to view the data you've already written.
The flush argument of the print () function can be set to True to stop the function from buffering the output data and forcibly flush it. If the flush argument is set to True, the print () function will not buffer the data to increase the efficiency and will keep flushing it on each call.
Output to a print() function is buffered, flushing the print() makes sure that the output that is buffered goes to the destination. Note: "flush" is available in Python 3.x or later versions. Syntax: print(argument1, argument2, ..., flush = value) Python examples with 'flush' parameter in print()
PrintWriter flush () method in Java with Examples Last Updated : 29 Jan, 2019 The flush () method of PrintWriter Class in Java is used to flush the stream. By flushing the stream, it means to clear the stream of any element that may be or maybe not inside the stream.
Normally output to a file or the console is buffered, with text output at least until you print a newline. The flush makes sure that any output that is buffered goes to the destination.
Normally output to a file or the console is buffered, with text output at least until you print a newline. The flush makes sure that any output that is buffered goes to the destination.
I do use it e.g. when I make a user prompt like Do you want to continue (Y/n):, before getting the input.
This can be simulated (on Ubuntu 12.4 using Python 2.7):
from __future__ import print_function import sys from time import sleep fp = sys.stdout print('Do you want to continue (Y/n): ', end='') # fp.flush() sleep(5) If you run this, you will see that the prompt string does not show up until the sleep ends and the program exits. If you uncomment the line with flush, you will see the prompt and then have to wait 5 seconds for the program to finish
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