[Tutor] Sorting specific files by modification date

[Kent Johnson]

Fiyawerx wrote:
> first_files = [ file for file in data['xls_files'] if u'First Worksheet' 
> in xlrd.open_workbook(file).sheet_names() ]
> data['first_file'] = ??

> This is where I get stuck, I'm trying to figure out how, from the files 
> that match, I can select the file with the most current time stamp and 
> use that as my main data file.

Something like this:

def fileTime(f):
   return os.stat(f).st_mtime

newest = max(first_files, key=fileTime)

Kent