makecsv.py

# coding: utf-8

import numpy as np

list = np.random.randn(90000)

list[29996] += 20
list[56789] += 20
list[88888] += 20
list[89999] += 10

with open("test.csv", "w") as f:
    f.write("data\n")
    for d in list:
        f.write("{0:f}\n".format(d))