Question

I have a text file with five columns. First column has year(2011 to 2040), 2nd has Tmax, 3rd has Tmin, 4th has Precip, and fifth has Solar for 30 years. I would like to write a python code which shuffles the first column (year) 10 times with remaining columns having the corresponding original values in them, that is: I want to shuffle year columns only for 10 times so that year 1 will have the corresponding values.

Answer 1

Read the text as a list of rows, each row being a list or tuple of columns. The csv module may be useful for this.

Then just shuffle the rows. The random module has a function called shuffle.

EDIT:

Assuming the input format is CSV (comma separated value):

import csv
import random

input_path = r"path\to\input"
output_path = r"path\to\output"

with open(input_path, "rb") as file:
    rows = list(csv.reader(file, delimiter=","))

random.shuffle(rows)

with open(output_path, "wb") as file:
    csv.writer(file, delimiter=",").writerows(rows)