So i have a big csv file and my code prints all the rows but i want to print, for example, only 20 random rows from 100000 rows. I know that somehow with random.sample
u can do that, but i don’t really know how. Any suggestions?
There is my code:
import csv with open(r'Z:/**/**/**/test_examples_doors/ **') as csvfile: data = csv.DictReader(csvfile) for row in data: if row['open']=='1': print(row['image'], row['open'])
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Answer
I assume you want to randomly sample your data, rather than just take the first 20 rows?
In this case you can convert data
to a list and then sample it:
import csv import random with open(r'Z:/datasets/room-segmentation/labeling/test_examples_doors/labels.csv') as csvfile: data = csv.DictReader(csvfile) sampled_data = random.sample(list(data), 20)