from importlib.metadata import files
import pprint

items = os.listdir("C:/Users/m/Desktop/EOF")

eof_files = []
for item in items:
  
    if item.lower().endswith('.eof'):
        eof_files.append(item)

eof_files.sort(key=lambda fname : fname.split('_')[6])
#keeping itemes
count=0
for eof_file in eof_files:
 if fname.split('_')[6]==fname.split('_')[6]+24

   print(f"Keeping: [eof_file]")

RollanRoll Wrote:then select and filtered 1th,24th,47th and.... (index ) of files and delete others because I need every 24 days information files( ex.V20190822T225942_20190824T005942) not all days information .for facility I select and chose these information files from first day I need so the first file is found then I should select 24 days after from first then 47 from first or 24 days after second file and so on.

from importlib.metadata import files
import pprint
from datetime import datetime, timedelta

def extract_date(filename: str) -> str:
    """ Extract the date from the name of a *.EOF file. """
    isotimepart = filename.split('_')[6]
    datepart = isotimepart[1:9]
    return datepart

twentyfourdays = timedelta(days=24)
eof_files = []

items = os.listdir("C:/Users/m/Desktop/EOF")
for item in items:
    if item.lower().endswith('.eof'):
        eof_files.append(item)

eof_files.sort(key=lambda fname: fname.split('_')[6])
# Keeping items.
# Choose the first file to keep.
nextdate = extract_date(eof_files[0])
for eof_file in eof_files:
    if extract_date(eof_file) == nextdate:
        print(f"Keeping: {eof_file}")
        # Create datetime object for date arithmetic.
        dateobj = datetime.strptime(nextdate, "%Y%m%d")
        nextobj = dateobj + twentyfourdays
        nextdate = nextobj.strftime("%Y%m%d")

Quote:Using importlib.metadata
New in version 3.8.

Changed in version 3.10: importlib.metadata is no longer provisional.