Best way to generate random file names in Python
In [4]: import tempfile

In [5]: tf = tempfile.NamedTemporaryFile()
In [6]: tf.name
Out[6]: 'c:\blabla\locals~1\temp\tmptecp3i'

In [7]: tf = tempfile.NamedTemporaryFile()
In [8]: tf.name
Out[8]: 'c:\blabla\locals~1\temp\tmpr8vvme'

tempfile.NamedTemporaryFile([mode='w+b'[, bufsize=-1[, suffix=''[, prefix='tmp'[, dir=None[, delete=True]]]]]])

In [9]: tf = tempfile.NamedTemporaryFile(prefix="zz")
In [10]: tf.name
Out[10]: 'c:\blabla\locals~1\temp\zzrc3pzk'

import uuid
filename = str(uuid.uuid4())

def add_prefix(filename):

  from hashlib import md5
  from time import localtime

  return "%s_%s" % (md5(str(localtime())).hexdigest(), filename)

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7a5f8289323b0ebfdbc7c840ad3cb67b_style.css

import datetime
basename = "mylogfile"
suffix = datetime.datetime.now().strftime("%y%m%d_%H%M%S")
filename = "_".join([basename, suffix]) # e.g. 'mylogfile_120508_171442'