Filter out the [[datetime]] default String for MacOS DE from a [[Screenshot]] (code for insertion in Automator Workflow as Service)

Remove macOS Screenshot DE Timestamps.py

#!/usr/bin/env python3
"""Remove macOS Screenshot DE Timestamps.py
Filter out the [[datetime]] default String for MacOS DE from a [[Screenshot]]

@Copyright 2023 by Armin Stross-Radschinski, ACSR industrialdesign developer@acsr.de

Licence: MIT, do what you like

Have fun

V 0.2.1 20240531_181322-acsr (adding license in the docstring)

20231109_163157 by Armin Stross-Radschinski, acsr.github@dev.acsr.de for acsr/evenios
20240531_170156-acsr added recreate Timestamp as Prefix
20240531_181322-acsr clarify docstring of extract_datetime()
"""

import sys
import re

regex = r"\s*\d\d\d\d-\d\d-\d\d um \d\d.\d\d.\d\d\s*"

#example_str = "Something totally different 2022-11-13 um 09.04.17.png"
#example_str = "2022-11-13 um 09.04.17 Something totally different.png"

subst = ""

def extract_datetime(filename):
    """We extract the matching pattern and reformat as simple DateTime ISO"""

    result = re.search(regex, filename)
    if result:
        result = result.group(0).strip().replace("-", "").replace(" um ", "_", 2).replace(".", "")
        return result+"-"
    else:
        return ""

def remove_datetime(filename):
    """You can manually specify the number of replacements by changing the 4th argument"""

    result = re.sub(regex, subst, filename, 1)

    if result:
        return result
    else:
        return filename

for filename in sys.stdin:
    datetimeprefix = extract_datetime(filename)
    croppedfilename = remove_datetime(filename)
    adddatetimeprefix = datetimeprefix+croppedfilename
    print(adddatetimeprefix, end="")

Rev 2: Code enhanced for re-adding the removed timestamp as brief ISO stamp prefix. Quick & dirty no validation at all. Guck hin was du tust ;-) – Look at what you're doing ;-)

Rev 3: clarify docstring of extract_datetime()

Rev 4: Fix python filename