mutagen: mp3 tags in not showing in windows explorer

PYTHON

from shutil import copyfile
from mutagen.mp3 import MP3
from mutagen.id3 import ID3, TIT2, TCON, TALB

def resetFile():
    """Copies original.mp3 to somefile.mp3 and returns an mutagen MP3 file handle"""
    filename = 'somefile.mp3'
    copyfile('original.mp3', filename)
    file = MP3(filename)
    return file
    
def showStuff(file, keys=['TIT2', 'TCON', 'TALB']):
    """Prints out specified id3 tags for a file"""
    for key in keys:
        print '%s: %s' % (key, file[key])

def saveFile(file):
    """Save the file"""
    # I'm having problems here.
    # Even without changing any tags, this causes
    # information in Windows Explorer to disappear.
    # However, I was able to see all the information
    # in WINAMP Media Player. So perhaps this is just
    # another case of Microsloth Winblows failing to
    # conform to standards? Both WINAMP and mutagen are
    # able to see the changes.
    file.save()

def setTitle(file, title):
    """Change the title"""
    file['TIT2'] = TIT2(0, title)


file = resetFile()
showStuff(file)
saveFile(file)
showStuff(file)

Windows Explorer implements an older version of the ID3 tags; you can use:
file.save(v2_version=3)
...with your code above, and the tags will show in Explorer on Windows 10.