Python `OS` package doesn't open files in order

Asked Oct 20 '22 at 22:06

Active Oct 20 '22 at 22:09

Viewed 20 times

I am trying to open bunch of .tif files and do some processing on them. I am using the following code to do this:

for images in os.listdir(folder_dir):
    if (images.endswith(".tif")):
        print(images)

The code works perfect; however, the only slight issue I have is that in one case, the files are not opened in order. See image below:

In the above example, it's clearly shown that picture #100 will be opened after picture #10. I expected to picture #100 will be opened after picture #99.

does anyone know why this is happening and how I can fix it?

edited Oct 20 '22 at 22:09

Barmar

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asked Oct 20 '22 at 22:06

Ross_you

1

The names are sorted lexicographically, not numerically. – Barmar Oct 20 '22 at 22:08
1

Not even so. No order at all is guaranteed. – chrslg Oct 20 '22 at 22:10
@Barmar any suggestion as how I can change the order to numerically? – Ross_you Oct 20 '22 at 22:10
See the question I linked to above. – Barmar Oct 20 '22 at 22:10
"the files are not opened in order" why do you expect *any* order for `os.listdir`? – juanpa.arrivillaga Oct 20 '22 at 23:05
@Barmar although, in this case, something like `sorted(os.listdir(path), key=lambda x: int(re.search("\d+").group(0)))` would probably work – juanpa.arrivillaga Oct 20 '22 at 23:08

Python `OS` package doesn't open files in order

0 Answers0