What to do if you can't sort files with subscripts
Hello is white
When I try to sort such a file, I can sort it well in the file, but when I try to process it with Python etc.
The order may be different from what you expected. .. ..
I got stuck in this, so I will write it down as a memo for myself.
approach
Put an extra 0000 before the subscript. This will solve the problem.
However, it's a hassle to manually rewrite all the names, so let's leave it all to Python.
As a premise, consider only adding the subscripts of the original file.
ex)img32.png ⇒ img00032.png
Required knowledge
- Get the file name (using os)
- Get subscripts from names (use regular expressions)
- Rename the file (using shutil)
is. It's easy, so let's finish it one by one.
1. Get file name (os)
Use something called os to get the file name.
import os
file_dl = './File/'
res = os.listdir(file_dl)
With this alone, I was able to get all the names of what was in the file that was file.
2. Obtaining a subscript from the name (regular expression re)
Next, let's get the subscript from the obtained file name.
import re
file_index = re.search(r'\d{1,}', 'img012.png').group()
Here, we use a regular expression to get only the numbers from the string.
In this case, only 012 is extracted from img012.png and stored in file_index.
3 Move files (shutil)
Finally, rename it and save it, using shutil. All I'm doing is renaming and moving it back to its original location.
import shutil
shutil.move(old_path,new_path)
By doing this, I was able to move what was in old_path to new_path.
Summary
If you connect the above
import os
import shutil
file_dl = './File/'
name = 'img_name'
#Get the folder name in the file
res = os.listdir(file_dl)
#Extract the files one by one using the for statement.
for target_name in res:
#Combine file path and file name
target_dl = file_dl + target_name
#Extract only subscripts using regular expressions
target_index = int(re.search(r'\d{1,}', target_name).group())
#Create a new file name
target_new_name = name+str("{0:05d}".format(target_index))+'.png'
#Rename the file and save it again
shutil.move(target_dl,file_dl+target_new_name)
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