CODEWITHSUNDEEP
python
Kong
Kong

Reputation: 2422

Append folder path to string name

I have several image names in my directory that I want to read. 

sq_of_images = listdir('images/sequence1/')  
sq_of_images = [img for img in sq_of_images if img.endswith(".jpg")]
print(sq_of_images)

['im_001.jpg', 'im_002.jpg', 'im_003.jpg', 'im_004.jpg', 'im_005.jpg', 'im_006.jpg', 'im_007.jpg', 'im_008.jpg', 'im_009.jpg', 'im_010.jpg', 'im_011.jpg', 'im_012.jpg', 'im_013.jpg', 'im_014.jpg', 'im_015.jpg', 'im_016.jpg', 'im_017.jpg', 'im_018.jpg', 'im_019.jpg', 'im_020.jpg', 'im_021.jpg', 'im_022.jpg', 'im_023.jpg', 'im_024.jpg', 'im_025.jpg', 'im_026.jpg', 'im_027.jpg', 'im_028.jpg', 'im_029.jpg', 'im_030.jpg'] 30

I'd like to append the folder path to the images as well but can't figure out how to do it. Typing it this way gives me an error.

sq_of_images = ['images/', img for img in sq_of_images if img.endswith(".jpg")]

Upvotes: 1

Views: 136

Answers (2)

Reut Sharabani
Reut Sharabani

Reputation: 31339

Although you can use simple string concatenation 'images/' + img, there is an os submodule for handling paths which is called path. You can use os.path.join to join paths:

from os import path
sq_of_images = [path.join('images/', img) for img in sq_of_images if img.endswith(".jpg")]

Upvotes: 2

Nico Albers
Nico Albers

Reputation: 1696

You can concatenate strings using plus sign instead of comma:

sq_of_images = ['images/' + img for img in sq_of_images if img.endswith(".jpg")]

You also can insert multiple fields into a string using format:

sq_of_images = [
    '{img_folder}/{img_name}'.format(img_folder='images', img_name=img) 
    for img in sq_of_images if img.endswith(".jpg")]

Of course you can also use the join function like Reut Sharabani proposed in his answer, I really like that approach more than operating with string methods because it is more robust.

Upvotes: 1

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