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Home/ Questions/Q 9023
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Alek Richter
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Alek RichterEnlightened
Asked: January 13, 20222022-01-13T10:13:32+00:00 2022-01-13T10:13:32+00:00

How to print without a newline or space

  • 0

I’d like to do it in Python. What I’d like to do in this example in C:

#include <stdio.h>

int main() {
    int i;
    for (i=0; i<10; i++) printf(".");
    return 0;
}

Output:

..........

In Python:

>>> for i in range(10): print('.')
.
.
.
.
.
.
.
.
.
.
>>> print('.', '.', '.', '.', '.', '.', '.', '.', '.', '.')
. . . . . . . . . .

In Python, print will add a \n or space. How can I avoid that? I’d like to know how to “append” strings to stdout.

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1 Answer

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  1. Alek Richter Enlightened
    2022-01-13T10:14:07+00:00Added an answer on January 13, 2022 at 10:14 am

    In Python 3, you can use the sep= and end= parameters of the print function:

    To not add a newline to the end of the string:

    print(‘.’, end=”)

    To not add a space between all the function arguments you want to print:

    print(‘a’, ‘b’, ‘c’, sep=”)

    You can pass any string to either parameter, and you can use both parameters at the same time.

    If you are having trouble with buffering, you can flush the output by adding flush=True keyword argument:

    print(‘.’, end=”, flush=True)

    Python 2.6 and 2.7

    From Python 2.6 you can either import the print function from Python 3 using the __future__ module:

    from __future__ import print_function

    which allows you to use the Python 3 solution above.

    However, note that the flush keyword is not available in the version of the print function imported from __future__ in Python 2; it only works in Python 3, more specifically 3.3 and later. In earlier versions you’ll still need to flush manually with a call to sys.stdout.flush(). You’ll also have to rewrite all other print statements in the file where you do this import.

    Or you can use sys.stdout.write()

    import sys
    sys.stdout.write(‘.’)

    You may also need to call

    sys.stdout.flush()

    to ensure stdout is flushed immediately.

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