I understand this is possible,
for r in range(0,1000):
print(("l1" + str(r)), end="\r")
time.sleep(0.1)
where this would print on the same line. Is it possible to do something like "\r\r" which will print one line above as well?
It is not possible to print anything on the line above in Python. Since newlines are simply \n, a string like:
Hello
World
Ends up looking like:
Hello\nWorld
Multiple print statements only add to this stream of characters, which makes it impossible to add anything before what has already been written, or in your case, the line above.
I'm writing a simple command line prompt script and noticed that lines printed immediately after doing a readline start with a leading space. Is there any way to avoid this behavior?
Sample function to demonstrate:
import sys
def foo():
print 'Enter some text.\n> ',
bar = sys.stdin.readline()[:-1]
print 'You entered "{0}"'.format(bar)
When I run this code I get:
>>> foo()
Enter some text.
> Hi
You entered "Hi"
^ the leading space I want to get rid of
This is Python 2's "soft-space" behavior. After a print thing, statement, the next print will print a leading space to separate the output from the previous print output. This can look weird when a different text source, such as user input, causes the output of the two prints to appear on different lines.
There are various ways to get around soft-spacing, but here, the most appropriate would be to use raw_input instead of sys.stdin.readline. It auto-strips the newline for you and allows you to specify a prompt:
print 'Enter some text.'
foo = raw_input('> ')
print 'You entered "{0}"'.format(foo)
I'm writing a program in python and I'd like to replace more than one line in the console with new text.
For example if I have 3 sentences printed to the console with:
print("Hello World!")
print("How are you!")
print("What's going on?")
Where each on is on a different line (and so has an \n).
How do I go about replacing all of this text when it displays in the console? I can't us \r in this situation due to the \n.
This is kind of an old post, but I came across it and worked out a solution as well. Added a timer, because otherwise the print statements bury each other and you'll only be able to read the last one. I'm on python 2.7:
import os
import time
os.system("printf 'Hello World!'")
time.sleep(1)
os.system("printf '\rHow are you?!'")
time.sleep(1.5)
os.system("printf '\rWhats going on?'")
os.system("echo ")
A simple fix would be to simply change the end separator for printing your strings. you can specify how you want the print function to separate calls with the end argument
print("hello world!", end="")
print("\rhello world again!")
In this case, we're setting the separator to "", which is nothing. So printing the next strings starts on the same line thus \r can be used. Compiling that gives you hello world again! on one line.
hi i want to ask if how i can put one line space in python 3.
i use this code:
#def space():
#print()
but when i want to print it there is a "none" that prints for me but i want just a line with nothing
i.e i want to type :
"hi how are you :
iam fine"
i want to have the space between "hi how are you " and "iam fine"
i give this to python3 :
print('hi how are you",space(),"iam fine")
but it will give me only:
hi how are you None iam fine ..
what is the problem here? what dose this none means?
print() happens immediately. If you want a newline then you need to return '\n' instead.
this is what you want:
def space():
return '\n'
None is what it sounds like, it's printing None because you're not giving print() any inputs
This question already has answers here:
How to print without a newline or space
(26 answers)
Closed 9 years ago.
When I use the print command, it prints whatever I want and then goes to a different line. For example:
print "this should be"; print "on the same line"
Should return:
this should be on the same line
but instead returns:
this should be
on the same line
More precisely I was trying to create a program with if that told me whether a number was a 2 or not
def test2(x):
if x == 2:
print "Yeah bro, that's tottaly a two"
else:
print "Nope, that is not a two. That is a (x)"
But it doesn't recognise the last (x) as the value entered, and rather prints exactly: "(x)" (the letter with the brackets). To make it work I have to write:
print "Nope, that is not a two. That is a"; print (x)
And if e.g. I enter test2(3) that gives:
Nope, that is not a two, that is a
3
So either I need to make Python recognise my (x) inside a print line as the number; or to print two separate things but on the same line.
IMPORTANT NOTE: I am using version 2.5.4
Another note: If I put print "Thing" , print "Thing2" it says "Syntax error" on the 2nd print.
In Python 3.x, you can use the end argument to the print() function to prevent a newline character from being printed:
print("Nope, that is not a two. That is a", end="")
In Python 2.x, you can use a trailing comma:
print "this should be",
print "on the same line"
You don't need this to simply print a variable, though:
print "Nope, that is not a two. That is a", x
Note that the trailing comma still results in a space being printed at the end of the line, i.e. it's equivalent to using end=" " in Python 3. To suppress the space character as well, you can either use
from __future__ import print_function
to get access to the Python 3 print function or use sys.stdout.write().
In Python 2.x just put a , at the end of your print statement. If you want to avoid the blank space that print puts between items, use sys.stdout.write.
import sys
sys.stdout.write('hi there')
sys.stdout.write('Bob here.')
yields:
hi thereBob here.
Note that there is no newline or blank space between the two strings.
In Python 3.x, with its print() function, you can just say
print('this is a string', end="")
print(' and this is on the same line')
and get:
this is a string and this is on the same line
There is also a parameter called sep that you can set in print with Python 3.x to control how adjoining strings will be separated (or not depending on the value assigned to sep)
E.g.,
Python 2.x
print 'hi', 'there'
gives
hi there
Python 3.x
print('hi', 'there', sep='')
gives
hithere
If you're using Python 2.5, this won't work, but for people using 2.6 or 2.7, try
from __future__ import print_function
print("abcd", end='')
print("efg")
results in
abcdefg
For those using 3.x, this is already built-in.
You simply need to do:
print 'lakjdfljsdf', # trailing comma
However in:
print 'lkajdlfjasd', 'ljkadfljasf'
There is implicit whitespace (ie ' ').
You also have the option of:
import sys
sys.stdout.write('some data here without a new line')
Utilize a trailing comma to prevent a new line from being presented:
print "this should be"; print "on the same line"
Should be:
print "this should be", "on the same line"
In addition, you can just attach the variable being passed to the end of the desired string by:
print "Nope, that is not a two. That is a", x
You can also use:
print "Nope, that is not a two. That is a %d" % x #assuming x is always an int
You can access additional documentation regarding string formatting utilizing the % operator (modulo).