I want to use random.choice() to choose 5 value from first column in csv as bandwidth. After running the program, the result is 5 identical values. What's wrong with my program?
I have tried random.sample(), but it doesn't work with the Error ' in sample raise ValueError("Sample larger than population or is negative") '. So i just want to use random.choice(), it did not report an error, but extracted 5 duplicate values.
with open('/home/wifi.csv', 'r') as fp: reader = csv.reader(fp) data = [row for row in reader] random.choice(data) #choose 5 value from first column as bandwidth bw = random.choice(data)*5 print(bw)
I expect the output is' 4.5 3.7 2.6 1.8 3.1 ' but the actual output is ' 4.5 4.5 4.5 4.5 4.5 '