How to insert random spaces in txt file?

I have a file with lines of DNA in a file called 'DNASeq.txt'. I need a code to read each line and split each line at random places (inserting spaces) throughout the line. Each line needs to be split at different places.

EX: I have: AAACCCHTHTHDAFHDSAFJANFAJDSNFADKFAFJ And I need something like this: AAA ADSF DFAFDDSAF ADF ADSF AFD AFAD

I have tried (!!!very new to python!!):

import random

for x in range(10):
  print(random.randint(50,250))

but that prints me random numbers. Is there some way to get a random number generated as like a variable?

Solution

You can read a file line wise, write each line character-wise in a new file and insert spaces randomly:

Create demo file without spaces:

with open("t.txt","w") as f:
    f.write("""ASDFSFDGHJEQWRJIJG
ASDFJSDGFIJ
SADFJSDFJJDSFJIDFJGIJSRGJSDJFIDJFG
SDFJGIKDSFGOROHPTLPASDMKFGDOKRAMGO""")

Read and rewrite demo file:

import random
max_no_space = 9 # if max sequence length without space
no_space = 0
with open("t.txt","r") as f, open("n.txt","w") as w: 
    for line in f:
        for c in line:
            w.write(c)
            if random.randint(1,6) == 1 or no_space >= max_no_space:
                w.write(" ")
                no_space = 0
            else:
                no_space += 1
with open("n.txt") as k:
    print(k.read())

Output:

ASDF SFD GHJEQWRJIJG 
A SDFJ SDG FIJ
SADFJSD FJ JDSFJIDFJG I JSRGJSDJ FIDJFG

The pattern of spaces is random. You can influence it by settin max_no_spaces or remove the randomness to split after max_no_spaces all the time

Edit:

This way of writing 1 character at a time if you need to read 200+ en block is not very economic, you can do it with the same code like so:

with open("t.txt","w") as f:
    f.write("""ASDFSFDGHJEQWRJIJSADFJSDFJJDSFJIDFJGIJSRGJSDJFIDJFGG
ASDFJSDGFIJSADFJSDFJJDSFJIDFJGIJSRGJSDJFIDJFGSADFJSDFJJDSFJIDFJGIJK
SADFJSDFJJDSFJIDFJGIJSRGJSDJFIDJFGSADFJSDFJJDSFJIDFJGIJSRGJSDJFIDJF
SDFJGIKDSFGOROHPTLPASDMKFGDOKRAMGSADFJSDFJJDSFJIDFJGIJSRGJSDJFIDJFG""")


import random
min_no_space = 10
max_no_space = 20 # if max sequence length without space
no_space = 0
with open("t.txt","r") as f, open("n.txt","w") as w: 
    for line in f:
        for c in line:
            w.write(c)
            if no_space > min_no_space:
                if random.randint(1,6) == 1 or no_space >= max_no_space:
                    w.write(" ")
                    no_space = 0
            else:
                no_space += 1
with open("n.txt") as k:
    print(k.read())

Output:

ASDFSFDGHJEQ WRJIJSADFJSDF JJDSFJIDFJGIJ SRGJSDJFIDJFGG
 ASDFJSDGFIJSA DFJSDFJJDSFJIDF JGIJSRGJSDJFIDJ FGSADFJSDFJJ DSFJIDFJGIJK
SADFJ SDFJJDSFJIDFJG IJSRGJSDJFIDJ FGSADFJSDFJJDS FJIDFJGIJSRG JSDJFIDJF
SDFJG IKDSFGOROHPTLPASDMKFGD OKRAMGSADFJSDF JJDSFJIDFJGI JSRGJSDJFIDJFG