Couting Numbers in ranges -Python

Question

I am writing a program that relays the number of integers in every 10,000,000 integers. There are over 1 billion integers in the file. The output needs to go to a different file. Is there a function I can use that will loop through every 10,000,000 integers for me rather than typing count_numbers(0, 10000001) count_numbers(1000000, 20000001) etc. every time? I currently have the following code:

f = open("countoutput.txt", "w")
def count_numbers(x, y):
    count = 0
    for line in filename:    
        for number in line.split():
            if int(number) > x and int(number) < y:
                count += 1
    f.write(str(count))

@WillemVanOnsem: OP has only this one question on their profile (could be a different username), but IIRC the last question was about writing the `count_numbers` function, not automating its usage — inspectorG4dget, Jul 20 '17 at 15:16
You could just pass in 1 number like 10000001 and then do `if int(number) > (x-10000001) and int(number) < x:` — Professor_Joykill, Jul 20 '17 at 15:17
@inspectorG4dget: [related](https://stackoverflow.com/questions/45194037/finding-average-of-numbers-in-list-python) :) — Willem Van Onsem, Jul 20 '17 at 15:17
@WillemVanOnsem: that's exactly the post I was thinking about. [I even answered it yesterday](https://stackoverflow.com/a/45194198/198633) — inspectorG4dget, Jul 20 '17 at 15:18
@WillemVanOnsem I saw a post from yesterday that I based some of this code off of, but it didn't answer my question : ( — Ellie, Jul 20 '17 at 15:26

score 0 · Answer 1 · answered Jul 20 '17 at 15:20

0

There's likely a terser way to do this, but here's what I have off the top of my head

for low,high in zip(range(0, 10**10, 10**7), range(10**7 +1, 10**10, 10**7)):
    count_numbers(low, high)

answered Jul 20 '17 at 15:20

inspectorG4dget

110,290
27
149
241

Would that loop through all of the file, or would I still have to input the range as "low, high"? – Ellie Jul 20 '17 at 15:46
That would loop through the whole file multiple times - once for each low,high pair – inspectorG4dget Jul 20 '17 at 15:48
So i would not have to input anything? – Ellie Jul 20 '17 at 15:48
Yes. Run this script and see what happens – inspectorG4dget Jul 20 '17 at 16:06
I get a number and then a lot of zeros – Ellie Jul 20 '17 at 16:13
I need the count for each range. The first number was correct, yes, but there are deffinetely not 0 in the other bins. – Ellie Jul 20 '17 at 16:24
do you have any advice on how to fix the problem of the 0's? Thank you for all of your help! – Ellie Jul 20 '17 at 16:59
Not without looking at what's in your input – inspectorG4dget Jul 20 '17 at 17:12
It is just a lot of random integers 4 bytes long. I unfortunately cannot attach the file. – Ellie Jul 20 '17 at 17:15

Couting Numbers in ranges -Python

1 Answers1