Using revised tempfile module

[Edward C. Jones]

#! /usr/bin/env python

import os, tempfile

# I have written code like this several times. It uses the deprecated
# function tempfile.mktemp. How do I write this with the new tempfile
# functions?

def do_something(filename1, filename2):
os.system('cat %s > %s' % (filename1, filename2))

filename1 = tempfile.mktemp()
filename2 = tempfile.mktemp()
try:
f = file(filename1, 'w')
f.write('abcd')
f.close()
do_something(filename1, filename2)
g = file(filename2, 'r')
print g.read()
g.close()
finally:
if os.path.exists(filename1):
os.remove(filename1)
if os.path.exists(filename2):
os.remove(filename2)

 

[John J. Lee]

#! /usr/bin/env python

import os, tempfile

# I have written code like this several times. It uses the deprecated
# function tempfile.mktemp. How do I write this with the new tempfile
# functions?

You read the tempfile.mkstemp documentation.


John

 

[Peter Hansen]

You read the tempfile.mkstemp documentation.

Or even just re-read the tempfile.mktemp documentation again, which says

Deprecated since release 2.3. Use mkstemp() instead.
Warning: Use of this function may introduce a security hole in your program.
By the time you get around to doing anything with the file name it returns,
someone else may have beaten you to the punch.

-Peter