[Python] Change timestamp on file to current time?

理論上一個檔案,會有 3個 time, create/access/modify, 在 windows/linux/mac 上會有些差異,mac 所認定的最早的datetime 開始日期和其他會有小小的不同。

以下是Python 存取 file datetime 的範例,首先是最簡單的 modify time:

import os
import time
from stat import *

#returns a list of all the files on the current directory
files = os.listdir('.')

for f in files:
  #my folder has some jpegs and raw images
  if f.lower().endswith('jpg') or f.lower().endswith('crw'):
    st = os.stat(f)
    atime = st[ST_ATIME] #access time
    mtime = st[ST_MTIME] #modification time

    new_mtime = mtime + (4*3600) #new modification time

    #modify the file timestamp


Modify file create / access / write timestamp with python under windows

Getting some sort of modification date in a cross-platform way is easy – just call os.path.getmtime(path) and you’ll get the Unix timestamp of when the file at path was last modified.

Getting file creation dates, on the other hand, is fiddly and platform-dependent, differing even between the three big OSes:

Putting this all together, cross-platform code should look something like this…

import os
import platform

def creation_date(path_to_file):
    Try to get the date that a file was created, falling back to when it was
    last modified if that isn't possible.
    See http://stackoverflow.com/a/39501288/1709587 for explanation.
    if platform.system() == 'Windows':
        return os.path.getctime(path_to_file)
        stat = os.stat(path_to_file)
            return stat.st_birthtime
        except AttributeError:
            # We're probably on Linux. No easy way to get creation dates here,
            # so we'll settle for when its content was last modified.
            return stat.st_mtime




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