Python: get the newest file in a dir

I need to get the newest file in a directory:

import os

def get_newest_file(extns):
    filelist = os.listdir(os.getcwd())
    filelist = filter(lambda x: not os.path.isdir(x) and extns in x,
                      filelist)
    return max(filelist, key=lambda x: os.stat(x).st_mtime)

The applied filter excludes subdirs “and” file with different extension than that passed as argument.

>>> get_newest_file('.log')
'L0403002.log'

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Devo ottenere il file più recente all’interno di una directory, in base
all’estensione:

import os

def get_newest_file(extns):
    filelist = os.listdir(os.getcwd())
    filelist = filter(lambda x: not os.path.isdir(x) and extns in x,
                      filelist)
    return max(filelist, key=lambda x: os.stat(x).st_mtime)

Il filtro applicato esclude le sottodirectory e i file con estensione diversa da quella passata come argomento.

>>> get_newest_file('.log')
'L0403002.log'

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