Python- Saving files for each loop results

Question

I want to save files for each result from the loop.

For example, I wrote the code but it only saves one file which is named "prac10.csv" which contains final results ([20, 12, 69, 31, 88, 40, 18, 71, 93, 19]).

epoch=10

randomlist=[]

for i in range (epoch):

    a=randint(1,100)

    randomlist.append(a)

    print(randomlist)

    with open('prac'+str(epoch)+'.csv','w') as f:

        f.write(str(randomlist))

However, I want to save the prac1.csv ~ prac10.csv with each loop results.

prac1.csv : [20]

prac2.csv : [20, 12]

prac3.csv : [20, 12, 69]

.....

prac10.csv : [20, 12, 69, 31, 88, 40, 18, 71, 93, 19]

How do I modify my code?

Answer 1

You are using the fixed variable file name 'prac'+str(epoch)+'.csv' and you are overwriting your file on each iterate, so you need to use a iteration variable for your filename (i in your example):

from random import randint

epoch = 10

randomlist = []

for i in range(epoch):

    a = randint(1, 100)

    randomlist.append(a)

    print(randomlist)

    with open('prac'+str(i+1)+'.csv', 'w') as f:

        f.write(str(randomlist))

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