Splitting large text file into smaller text files by line numbers using Python

Question

I have a text file say really_big_file.txt that contains:

line 1
line 2
line 3
line 4
...
line 99999
line 100000

I would like to write a Py

Answer 1

Set files to the number of file you want to split the master file to in my exemple i want to get 10 files from my master file

files = 10
with open("data.txt","r") as data :
    emails = data.readlines()
    batchs = int(len(emails)/10)
    for id,log in enumerate(emails):
        fileid = id/batchs
        file=open("minifile{file}.txt".format(file=int(fileid)+1),'a+')
        file.write(log)