How to name my file based on a randomly generated number?

Question

I want to name my file as the student number comes up.

Here is the code:

import random
SNumber=random.randint(199999,999999)
print(SNumber)
writefile=open("studentNumberhere.txt","a")
writefile.write(SNumber)
writefile.close()

If the code runs and it generates the number: 123456

The filename would be 123456.txt

And if I generate another number, there will be another file appearing on my folder.

Does this answer your question? [How do I put a variable inside a string?](https://stackoverflow.com/questions/2960772/how-do-i-put-a-variable-inside-a-string) — Gino Mempin, Jan 15 '22 at 02:23

score 1 · Answer 1 · answered Mar 13 '18 at 09:36

1

import random
SNumber=random.randint(199999,999999)
print(SNumber)
writefile = open(str(SNumber)+'.txt','a')
writefile.write(str(SNumber))
writefile.close()

answered Mar 13 '18 at 09:36

Yarn

84
4

Sinto · Answer 2 · 2018-03-13T10:28:03.403

0

writefile = open(str(SNumber)+'.txt','a')

If the file does not exists, open(name,'r+') will fail.

You can use open(name, 'w'), which creates the file if the file does not exist, but it will truncate the existing file.

Alternatively, you can use open(name, 'a'); this will create the file if the file does not exist, but will not truncate the existing file.

import sys
import random
def create():
SNumber=random.randint(199999,999999)
try:
    writefile = open(str(SNumber)+'.txt','a')
    writefile.write(SNumber)
    writefile.close()
except:
    print("Error occurred.")
    sys.exit(0)

create()

edited Mar 13 '18 at 10:28

answered Mar 13 '18 at 09:39

Sinto

3,915
11
36
70

Hi sir, what if i will open the said file for file checker. umm because if the data already exists in the file. it will be discarded. – Rigel Panaligan Mar 13 '18 at 10:05
I'm not so familiar with `Python`. And so, not understand your comment. – Sinto Mar 13 '18 at 10:08
If you have used `open(name, 'a')` then it will not be discarded. `open(name, 'w')` will discard earlier data's in file – Sinto Mar 13 '18 at 10:09
Does it helped? – Sinto Mar 13 '18 at 10:20
yes sir. it helped. just my 2nd code does not jam with your code. and it is my only problem sir. Thank You – Rigel Panaligan Mar 13 '18 at 10:23

How to name my file based on a randomly generated number?

2 Answers2