How do I keep Python print from adding newlines or spaces? [duplicate]

Answer 1

import sys

sys.stdout.write('h')
sys.stdout.flush()

sys.stdout.write('m')
sys.stdout.flush()

You need to call sys.stdout.flush() because otherwise it will hold the text in a buffer and you won't see it.

Answer 2

Or use a +, i.e.:

>>> print 'me'+'no'+'likee'+'spacees'+'pls'
menolikeespaceespls

Just make sure all are concatenate-able objects.

Answer 3

In python 2.6:

>>> print 'h','m','h'
h m h
>>> from __future__ import print_function
>>> print('h',end='')
h>>> print('h',end='');print('m',end='');print('h',end='')
hmh>>>
>>> print('h','m','h',sep='');
hmh
>>>

So using print_function from __future__ you can set explicitly the sep and end parameteres of print function.

Answer 4

sys.stdout.write is (in Python 2) the only robust solution. Python 2 printing is insane. Consider this code:

print "a",
print "b",

This will print a b, leading you to suspect that it is printing a trailing space. But this is not correct. Try this instead:

print "a",
sys.stdout.write("0")
print "b",

This will print a0b. How do you explain that? Where have the spaces gone?

I still can't quite make out what's really going on here. Could somebody look over my best guess:

My attempt at deducing the rules when you have a trailing , on your print:

First, let's assume that print , (in Python 2) doesn't print any whitespace (spaces nor newlines).

Python 2 does, however, pay attention to how you are printing - are you using print, or sys.stdout.write, or something else? If you make two consecutive calls to print, then Python will insist on putting in a space in between the two.

Answer 5

Regain control of your console! Simply:

from __past__ import printf

where __past__.py contains:

import sys
def printf(fmt, *varargs):
    sys.stdout.write(fmt % varargs)

then:

>>> printf("Hello, world!\n")
Hello, world!
>>> printf("%d %d %d\n", 0, 1, 42)
0 1 42
>>> printf('a'); printf('b'); printf('c'); printf('\n')
abc
>>>

Bonus extra: If you don't like print >> f, ..., you can extending this caper to fprintf(f, ...).

Answer 6

I am not adding a new answer. I am just putting the best marked answer in a better format. I can see that the best answer by rating is using sys.stdout.write(someString). You can try this out:

    import sys
    Print = sys.stdout.write
    Print("Hello")
    Print("World")

will yield:

HelloWorld

That is all.