print control characters in python shell

[heiro]

I have problem printing in console. How can i print a character that will be printed in one line only.Like a countdown timer that will output the character 10-0 in one line:

x=10
while x!=10:
     print x
     x-=1
 

output should not be like this..
10
9
8
etc..

but it should print in one line like this..

10 then '10' will become 9 then 8 etc...

hope you understand what i am trying to ask....

[bartonc]

I have problem printing in console. How can i print a character that will be printed in one line only.Like a countdown timer that will output the character 10-0 in one line:

x=10
while x!=10:
     print x
     x-=1
 

output should not be like this..
10
9
8
etc..

but it should print in one line like this..

10 then '10' will become 9 then 8 etc...

hope you understand what i am trying to ask....

print accepts a comma to supress the newline at the end and add a space.

x = 10
while x > -1:
     print x,
     x -= 1

Speaking of spaces: They increase readability of your code greatly.

[elcron]

Or if you prefer to have more control over the spaces in between you could use the following:

x = 10
spacer = ' - ' # replace with whatever you want as long as it's a string
toPrint = ""
    while x > -1:
        toPrint += str(x)
        x -= 1
        if  x > -1: # prevents trailing spacer
            toPrint += spacer
print toPrint
# 10 - 9 - 8 - 7 - 6 - 5 - 4 - 3 - 2 - 1 - 0
 

[rhitam30111985]

I have problem printing in console. How can i print a character that will be printed in one line only.Like a countdown timer that will output the character 10-0 in one line:

x=10
while x!=10:
     print x
     x-=1
 

output should not be like this..
10
9
8
etc..

but it should print in one line like this..

10 then '10' will become 9 then 8 etc...

hope you understand what i am trying to ask....

I am not sure if the following is what you are trying to do:

import os
import time
x=10
while x>-1:
     print x
     time.sleep(1)
     os.system('clear')
     x-=1
 

[heiro]

I think rhitam30111985 get the idea but the problem is, what if i printed many string on the screen before the timer starts. So if we will use the cls command all of these will be deleted on the screen.

Lets imagine another thing,let say we are making a progress bar that will be displaying 0% to 100%.How will I do that??Once again thanks guys...

[KaezarRex]

I think rhitam30111985 get the idea but the problem is, what if i printed many string on the screen before the timer starts. So if we will use the cls command all of these will be deleted on the screen.

Lets imagine another thing,let say we are making a progress bar that will be displaying 0% to 100%.How will I do that??Once again thanks guys...

You mean like this?

x = 10
while x > -1:
    print "\b%i" % x,
    for i in range(len(str(x))):
        print "\b\b",
    x -= 1

You may have to change where and when "\b" is printed, but that should be about right.

[KaezarRex]

Here's a script that I wrote recently trying to accomplish something similar.

import time
 
spinner = "-\|/"
starttime = time.time()
duration = 5
 
print " ",
 
while time.time() - starttime < duration:
    for item in spinner:
        print "\b\b" + item,
        time.sleep(0.05)

[heiro]

Here's a script that I wrote recently trying to accomplish something similar.

import time
 
spinner = "-\|/"
starttime = time.time()
duration = 5
 
print " ",
 
while time.time() - starttime < duration:
    for item in spinner:
        print "\b\b" + item,
        time.sleep(0.05)

yah this is right!!!!!
thanks for this KaezarRex.Would you mind if i ask what "\b" is for?

[KaezarRex]

yah this is right!!!!!
thanks for this KaezarRex.Would you mind if i ask what "\b" is for?

It's an escape sequence, so pretty much a string that represents a symbol you can't type. In this case "\b" means "backspace", so you are backing up the cursor over the number you just printed. You have to use two in a row because a comma in a print statement prints an extra " ".

[heiro]

It's an escape sequence, so pretty much a string that represents a symbol you can't type. In this case "\b" means "backspace", so you are backing up the cursor over the number you just printed. You have to use two in a row because a comma in a print statement prints an extra " ".

thank you so much for this......i learned something new from u....
TYVM