small script make random unique string with define length

randomStr.py

import uuid

size = 10000000     #number of uniqe strings
length = 5      #length of generated strings
filename = "result.txt" #name of result file

temp = []
print("START...")
with open(filename, 'w') as f:
    while size > 0:
        ch = uuid.uuid4().hex[:length]
        if (ch not in temp):
            f.write(ch + '\n')
            temp.append(ch)
            size = size - 1
print()
print("Done ^_^ ...")