Generate a filename in python

Question

I feel like this question was answered many times before, but i can't find anything.

I have a script which takes a text as command line argument and then generates images with the text in it. It generates image for every word enterd in to the command line but I don't know how to save them. I want to save them like this; first image would be saved as 0001.png, the second one as 0002.png and so on, how can I do this?

Answer 1

Use f-strings, you can specify how many 0's the digit should have at minimum:

for i in range(1, 1200, 103): # Just to generate bigger numbers
    print(f"{i:04d}.png")

Output:

0001.png
0104.png
0207.png
0310.png
0413.png
0516.png
0619.png
0722.png
0825.png
0928.png
1031.png
1134.png