Programming Forums > Script Programming > Python

MR.T · Sep 26th, 2006, 8:48 PM

When I print something in python with a for loop it automatically skips a line after each print, like this:

0
1
2
3
4
5

How do I keep it from skipping a line so it outputs like this: 012345?

thanks

DaWei · Sep 26th, 2006, 8:53 PM

Investigate the comma. That may still not suit you, so look into formatted printing. There is a ton of information on it in the Python docs. You could, of course, simply concatenate prior to the print.

Arevos · Sep 27th, 2006, 6:25 AM

As DaWei says, you can use a trailing comma:

 python Syntax (Toggle Plain Text) 
for i in range(6):
     print i,
print
# prints: 0 1 2 3 4 5
for i in range(6):
     print i,
print
# prints: 0 1 2 3 4 5

Although this has the disadvantage of placing a space between each number. Or you could concatenate the numbers together:

 python Syntax (Toggle Plain Text) 
output = ""
for i in range(6):
    output += str(i)
print output
# prints: 012345
output = ""
for i in range(6):
    output += str(i)
print output
# prints: 012345

Or you could use a list comprehension:

 python Syntax (Toggle Plain Text) 
print "".join(str(i) for i in range(6))
# prints 012345
print "".join(str(i) for i in range(6))
# prints 012345

Or you could use sys.stdout.write():

 python Syntax (Toggle Plain Text) 
import sys
for i in range(6):
    sys.stdout.write(str(i))
sys.stdout.write("\n")
# prints 012345
import sys
for i in range(6):
    sys.stdout.write(str(i))
sys.stdout.write("\n")
# prints 012345

MR.T · Sep 27th, 2006, 1:56 PM

Ok, thanks for the help. I fixed my problem using the second method Arevos sugested.

peace_of_mind · Sep 27th, 2006, 2:39 PM

In the future posting the code you're having trouble with will help you get more helpful posts much quicker. Glad you got it sorted out, though.

Dietrich · Sep 28th, 2006, 5:46 PM

Just to be correct, our esteemed Arevos' list comprehension is really a generator expression.

free-zombie · Oct 9th, 2006, 5:01 PM

... and generator expressions are new in python2.4
luckily, python2.4 will enter debian stable soon (if etch is on time), which removes my last excuse to stick with python2.3

titaniumdecoy · Oct 9th, 2006, 6:00 PM

Are you kidding? The current version of Python is 2.5, you know.

Dietrich · Oct 11th, 2006, 3:16 PM

Quote:

Originally Posted by titaniumdecoy

Are you kidding? The current version of Python is 2.5, you know.

Unless your customer uses Python 2.3

hydroxide · Oct 23rd, 2006, 12:30 PM

Quote:

Originally Posted by Dietrich

Unless your customer uses Python 2.3

Heh! I've been pushing to get rid of 2.2 support from a certain project for a while -- the idioms 2.3 adds are so much nicer. Ah well... 2.5 will go stable sometime... as will 2.6... as will 2.7...

yrs obsolescent-compatibility-hurts-my-eyes-ly, -T.

Sep 26th, 2006, 8:48 PM	#1
MR.T Newbie Join Date: Feb 2006 Location: USA,Michigan Posts: 22 Rep Power: 0	print problem When I print something in python with a for loop it automatically skips a line after each print, like this: 0 1 2 3 4 5 How do I keep it from skipping a line so it outputs like this: 012345? thanks __________________ "Gee, Brain, what do you want to do tonight?" "The same thing we do every night, Pinky: Try to take over the world!"

Sep 26th, 2006, 8:53 PM	#2
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Investigate the comma. That may still not suit you, so look into formatted printing. There is a ton of information on it in the Python docs. You could, of course, simply concatenate prior to the print. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Sep 27th, 2006, 6:25 AM	#3
Arevos Programming Guru Join Date: Aug 2005 Location: England Posts: 1,499 Rep Power: 5	As DaWei says, you can use a trailing comma: python Syntax (Toggle Plain Text) for i in range(6): print i, print # prints: 0 1 2 3 4 5 for i in range(6): print i, print # prints: 0 1 2 3 4 5 Although this has the disadvantage of placing a space between each number. Or you could concatenate the numbers together: python Syntax (Toggle Plain Text) output = "" for i in range(6): output += str(i) print output # prints: 012345 output = "" for i in range(6): output += str(i) print output # prints: 012345 Or you could use a list comprehension: python Syntax (Toggle Plain Text) print "".join(str(i) for i in range(6)) # prints 012345 print "".join(str(i) for i in range(6)) # prints 012345 Or you could use sys.stdout.write(): python Syntax (Toggle Plain Text) import sys for i in range(6): sys.stdout.write(str(i)) sys.stdout.write("\n") # prints 012345 import sys for i in range(6): sys.stdout.write(str(i)) sys.stdout.write("\n") # prints 012345

Sep 27th, 2006, 1:56 PM	#4
MR.T Newbie Join Date: Feb 2006 Location: USA,Michigan Posts: 22 Rep Power: 0	Ok, thanks for the help. I fixed my problem using the second method Arevos sugested. __________________ "Gee, Brain, what do you want to do tonight?" "The same thing we do every night, Pinky: Try to take over the world!"

Sep 27th, 2006, 2:39 PM	#5
peace_of_mind Professional Programmer Join Date: Sep 2004 Location: Hell if I know most of the time Posts: 439 Rep Power: 4	In the future posting the code you're having trouble with will help you get more helpful posts much quicker. Glad you got it sorted out, though. __________________ Amateurs built the ark Professionals built the Titanic

Sep 28th, 2006, 5:46 PM	#6
Dietrich Professional Programmer Join Date: Feb 2005 Posts: 434 Rep Power: 4	Just to be correct, our esteemed Arevos' list comprehension is really a generator expression. __________________ I looked it up on the Intergnats!

Oct 9th, 2006, 5:01 PM	#7
free-zombie Programmer Join Date: May 2006 Location: Bavaria, Germany Posts: 50 Rep Power: 0	... and generator expressions are new in python2.4 luckily, python2.4 will enter debian stable soon (if etch is on time), which removes my last excuse to stick with python2.3

Oct 9th, 2006, 6:00 PM	#8
titaniumdecoy Expert Programmer Join Date: Nov 2005 Posts: 839 Rep Power: 3	Are you kidding? The current version of Python is 2.5, you know.

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Programming Forums > Script Programming > Python

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