Python：在目录中查找带有 .MP3 扩展名的最新文件
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Python: Find newest file with .MP3 extension in directory
提问by Butters
I am trying to find the most recently modified (From here on out 'newest') file of a specific type in Python. I can currently get the newest, but it doesn't matter what type. I would like to only get the newest MP3 file.
我试图在 Python 中找到特定类型的最近修改的（从这里开始的“最新”）文件。我目前可以获得最新的，但不管是什么类型。我只想获取最新的 MP3 文件。
Currently I have:
目前我有：
import os
newest = max(os.listdir('.'), key = os.path.getctime)
print newest
Is there a way to modify this to only give me only the newest MP3 file?
有没有办法修改它只给我最新的 MP3 文件？
采纳答案by falsetru
回答by scohe001
Give this guy a try:
试试这个人：
import os
print max([f for f in os.listdir('.') if f.lower().endswith('.mp3')], key=os.path.getctime)
回答by Kevin Vincent
Assuming you have imported os and defined your path, this will work:
假设您已导入 os 并定义了您的路径，这将起作用：
dated_files = [(os.path.getmtime(fn), os.path.basename(fn))
for fn in os.listdir(path) if fn.lower().endswith('.mp3')]
dated_files.sort()
dated_files.reverse()
newest = dated_files[0][1]
print(newest)
回答by Arjun Krishna
for file in os.listdir(os.getcwd()):
if file.endswith(".mp3"):
print "",file
newest = max(file , key = os.path.getctime)
print "Recently modified Docs",newest
回答by Michael S.
For learning purposes here my code, basically the same as from @Kevin Vincent though not as compact, but better to read and understand:
出于学习目的，我的代码与@Kevin Vincent 的代码基本相同，虽然不那么紧凑，但更易于阅读和理解：
import datetime
import glob
import os
mp3Dir = "C:/mp3Dir/"
filesInmp3dir = os.listdir(mp3Dir)
datedFiles = []
for currentFile in filesInmp3dir:
if currentFile.lower().endswith('.mp3'):
currentFileCreationDateInSeconds = os.path.getmtime(mp3Dir + "/" + currentFile)
currentFileCreationDateDateObject = datetime.date.fromtimestamp(currentFileCreationDateInSeconds)
datedFiles.append([currentFileCreationDateDateObject, currentFile])
datedFiles.sort();
datedFiles.reverse();
print datedFiles
latest = datedFiles[0][1]
print "Latest file is: " + latest
