multiple prints on the same line in Python

Question

I want to run a script, which basically shows an output like this:

Installing XXX...               [DONE]

Currently, I print Installi

Answer 1

Use sys.stdout.write('Installing XXX... ') and sys.stdout.write('Done'). In this way, you have to add the new line by hand with "\n" if you want to recreate the print functionality. I think that it might be unnecessary to use curses just for this.

Answer 2

None of the answers worked for me since they all paused until a new line was encountered. I wrote a simple helper:

def print_no_newline(string):
    import sys
    sys.stdout.write(string)
    sys.stdout.flush()

To test it:

import time
print_no_newline('hello ')
# Simulate a long task
time.sleep(2)
print('world')

"hello " will first print out and flush to the screen before the sleep. After that you can use standard print.

Answer 3

Just in case you have pre-stored the values in an array, you can call them in the following format:

for i in range(0,n):
       print arr[i],

Answer 4

I found this solution, and it's working on Python 2.7

# Working on Python 2.7 Linux

import time
import sys


def backspace(n):
    print('\r', end='')                     # use '\r' to go back


for i in range(101):                        # for 0 to 100
    s = str(i) + '%'                        # string for output
    sys.stdout.write(string)
    backspace(len(s))                       # back for n chars
    sys.stdout.flush()
    time.sleep(0.2)                         # sleep for 200ms

Answer 5

You can simply use this:

print 'something',
...
print ' else',

and the output will be

something else

no need to overkill by import sys. Pay attention to comma symbol at the end.

Python 3+ print("some string", end=""); to remove the newline insert at the end. Read more by help(print);

Answer 6

Here a 2.7-compatible version derived from the 3.0 version by @Vadim-Zin4uk:

Python 2

import time

for i in range(101):                        # for 0 to 100
    s = str(i) + '%'                        # string for output
    print '{0}\r'.format(s),                # just print and flush

    time.sleep(0.2)

For that matter, the 3.0 solution provided looks a little bloated. For example, the backspace method doesn't make use of the integer argument and could probably be done away with altogether.

Python 3

import time

for i in range(101):                        # for 0 to 100
    s = str(i) + '%'                        # string for output
    print('{0}\r'.format(s), end='')        # just print and flush

    time.sleep(0.2)                         # sleep for 200ms

Both have been tested and work.