How can I check how many lines are treated by printing dot in python program?

Question

I just want to check the the number of treated lines during program running. (I treat txt file with about million lines.)

to check the number of treated lines during running time, I use this code below

lineCnt = 0
for line in lines:
    lineCnt += 1
    if lineCnt % 2500 == 0:
        sys.stdout.write('.')
    if lineCnt % 100000 == 0:
        print("")

I expected printing 1 dot on screen when 2500 lines are treated. but, I just can see printing 40 dots at same time. when 100000 lines are treated.

how can i fix it to get the result exactly what I want? T.T

Why are you calling `sys.stdout.write` directly in line 5, then just using `print` in line 7? — Carl Smith, Mar 10 '13 at 09:07
if use print new line character is added at the end of line automatically. I just want printing new line when 100000 lines treated. — 이승원, Mar 10 '13 at 09:18

score 2 · Answer 1 · edited Mar 10 '13 at 11:58

2

Try adding sys.stdout.flush() after sys.stdout.write('.').

Of you could use print there. If you do not want new line after dot, call print like this:

In Python 3.X: print('.', end='')

In Python 2.X: print '.',

edited Mar 10 '13 at 11:58

monsur

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answered Mar 10 '13 at 11:33

del-boy

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score 0 · Answer 2 · answered Mar 10 '13 at 11:09

Do you want to print 40 dots at once when there are very many dots?

lineCnt = 0
for line in lines:
    lineCnt += 1
    if lineCnt > 100000:
        if lineCnt % 100000 == 0:
            print("." * 40)
    elif lineCnt % 2500 == 0:
        sys.stdout.write('.')

How can I check how many lines are treated by printing dot in python program?

2 Answers2