Finding most recently edited file in python

问题

I have a set of folders, and I want to be able to run a function that will find the most recently edited file and tell me the name of the file and the folder it is in.

Folder layout:

root
    Folder A
        File A
        File B
    Folder B
        File C
        File D
etc...

Any tips to get me started as i've hit a bit of a wall.

回答1:

You should look at the os.walk function, as well as os.stat, which can let you do something like:

import os

max_mtime = 0
for dirname,subdirs,files in os.walk("."):
    for fname in files:
        full_path = os.path.join(dirname, fname)
        mtime = os.stat(full_path).st_mtime
        if mtime > max_mtime:
            max_mtime = mtime
            max_dir = dirname
            max_file = fname

print max_dir, max_file

回答2:

It helps to wrap the built in directory walking to function that yields only full paths to files. Then you can just take the function that returns all files and pick out the one that has the highest modification time:

import os

def all_files_under(path):
    """Iterates through all files that are under the given path."""
    for cur_path, dirnames, filenames in os.walk(path):
        for filename in filenames:
            yield os.path.join(cur_path, filename)

latest_file = max(all_files_under('root'), key=os.path.getmtime)

回答3:

use os.walk to list files
use os.stat to get file modified timestamp (st_mtime)
put both timestamps and filenames in a list and sort it by timestamp, largest timestamp is most recently edited file.

回答4:

If anyone is looking for an one line way to do it:

latest_edited_file = max([f for f in os.scandir("path\\to\\search")], key=lambda x: x.stat().st_mtime).name

回答5:

You can use

os.walk

See: http://docs.python.org/library/os.html

回答6:

Use os.path.walk() to traverse the directory tree and os.stat().st_mtime to get the mtime of the files.

The function you pass to os.path.walk() (the visit parameter) just needs to keep track of the largest mtime it's seen and where it saw it.

回答7:

I'm using path = r"C:\Users\traveler\Desktop":

import os
def all_files_under(path):
   #"""Iterates through all files that are under the given path."""
   for cur_path, dirnames, filenames in os.walk(path):
      for filename in filenames:
         yield os.path.join(cur_path, filename)
latest_file = max(all_files_under('root'), key=os.path.getmtime)

What am i missing here?

来源：https://stackoverflow.com/questions/2731014/finding-most-recently-edited-file-in-python

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