CODEWITHSUNDEEP
pythonjupyter-notebookflush
titipata
titipata

Reputation: 5389

Flush output in for loop in Jupyter notebook

I want to print out i in my iteration on Jupyter notebook and flush it out. After the next iteration, I'll print the next i. I tried solutions from this question and this question, however, it just print out 0123...9 without flushing the output for me. Here is my working code:

import sys
import time

for i in range(10):
    sys.stdout.write(str(i)) # or print(i, flush=True) ?
    time.sleep(0.5)
    sys.stdout.flush()

these are my setup: ipython 5.1, python 3.6. Maybe, I missed something in the previous solution?

Upvotes: 13

Views: 20482

Answers (3)

Илья Царенков
Илья Царенков

Reputation: 31

Try this

for i in range (10):  
    print("\r", end=str(i))

Upvotes: 3

Alperen
Alperen

Reputation: 4602

The first answer is correct but you don't need sys package. You can use the end parameter of the print function. It specifies what to print at the end, and its default value is \n(newline) (docs1, docs2). Use \r(carriage return) instead.

import time

for i in range (10):  
    print(i, end="\r")
    time.sleep(0.5) # This line is to see if it's working or not

Upvotes: 10

jose_bacoy
jose_bacoy

Reputation: 12684

#Try this:
import sys
import time

for i in range (10):  
    sys.stdout.write('\r'+str(i))
    time.sleep(0.5)

'\r' will print at the beginning of the line

Upvotes: 15

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