Change the length of Python csv strings

import csv I had to change the length of the csv string during the extremum test. I wish I had done it quickly with EXCEL, but I changed the length of the character string with Python because of my interest. Below is the code


import csv
import random

#List for output
exp_list = []
max_len = 256
#read csv
with open(r'sample.csv', 'r',encoding='utf-8') as f:
    reader = csv.reader(f)
    for r in reader:
        buff = ''
        r_len = len(r[0])
        while len(r) < max_len - r_len:
            ran = random.randrange(10)
            r += str(ran)
        for x in r:
            buff += x
#csv write
with open(r'output.csv', 'w',encoding='utf-8') as f:
    writer = csv.writer(f, lineterminator='\n')

Execution result

Execution command.txt








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