I have a list of filenames, some of them have only text, some of them have text and number, and some of them have all.
Example:
[ 'mango_1.jpg', 'dog005.jpg', 'guru_2018_01_01.png', 'dog008.jpg', 'mango_6.jpg', 'guru_2018_5_23.png', 'dog01.png', 'mango_11.jpg', 'mango2.jpg', 'guru_2018_02_5.png', 'guru_2019_08_23.jpg', 'dog9.jpg', 'mango05.jpg' ]
My Code is :
import re
## ref: https://blog.codinghorror.com/sorting-for-humans-natural-sort-order/
def sort_nicely( l ):
""" Sort the given list in the way that humans expect.
"""
convert = lambda text: int(text) if text.isdigit() else text
alphanum_key = lambda key: [ convert(c) for c in re.split('([0-9]+)', key) ]
l.sort( key=alphanum_key )
return print(l)
Actual output:
['dog01.png', 'dog005.jpg', 'dog008.jpg', 'dog9.jpg', 'guru_2018_01_01.png', 'guru_2018_02_5.png', 'guru_2018_5_23.png', 'guru_2019_08_23.jpg', 'mango2.jpg', 'mango05.jpg', 'mango_1.jpg', 'mango_6.jpg', 'mango_11.jpg']
Expected output:
['dog01.png', 'dog005.jpg', 'dog008.jpg', 'dog9.jpg', 'guru_2018_01_01.png', 'guru_2018_02_5.png', 'guru_2018_5_23.png', 'guru_2019_08_23.jpg', 'mango_1.jpg', 'mango2.jpg', 'mango5.jpg', 'mango_6.jpg', 'mango_11.jpg']
How do I get the expected output?
Looks like you are not giving any significance to _ character in that case, modify your code to exclude that
import re
## ref: https://blog.codinghorror.com/sorting-for-humans-natural-sort-order/
def sort_nicely( l ):
""" Sort the given list in the way that humans expect.
"""
convert = lambda text: int(text) if text.isdigit() else text
alphanum_key = lambda key: [ convert(c.replace("_","")) for c in re.split('([0-9]+)', key) ]
l.sort( key=alphanum_key )
return print(l)
```