希望此功能可以对您有所帮助（我正在使用Python 2.7）：
import os
def get_files_by_file_size(dirname, reverse=False):
""" Return list of file paths in directory sorted by file size """
# Get list of files
filepaths = []
for basename in os.listdir(dirname):
filename = os.path.join(dirname, basename)
if os.path.isfile(filename):
filepaths.append(filename)
# Re-populate list with filename, size tuples
for i in xrange(len(filepaths)):
filepaths[i] = (filepaths[i], os.path.getsize(filepaths[i]))
# Sort list by file size
# If reverse=True sort from largest to smallest
# If reverse=False sort from smallest to largest
filepaths.sort(key=lambda filename: filename[1], reverse=reverse)
# Re-populate list with just filenames
for i in xrange(len(filepaths)):
filepaths[i] = filepaths[i][0]
return filepaths
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